13 Exhibit 24 Powers of Attorney 14 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this 29th day of February, 2000. /s/ Michael J. Gasser Michael J. Gasser 15 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this 29th day of February, 2000. /s/ Joseph W. Reed Joseph W. Reed 16 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this 29th day of February, 2000. /s/ John K. Dieker John K. Dieker 17 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this 29th day of February, 2000. /s/ Charles R. Chandler Charles R. Chandler 19 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this 29th day of February, 2000. /s/ Michael H. Dempsey Michael H. Dempsey 20 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as her true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for her and in her name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as she might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or her or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set her hand as of this 29th day of February, 2000. /s/ Naomi C. Dempsey Naomi C. Dempsey 21 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. 		IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this 29th day of February, 2000. /s/ Daniel J. Gunsett Daniel J. Gunsett 22 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this 2nd day of March, 2000. /s/ John C. Kane John C. Kane 23 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this 1st day of March, 2000. /s/ Robert C. Macauley Robert C. Macauley 23 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this 29th day of February, 2000. /s/ David J. Olderman David J. Olderman 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned officer and/or director of GREIF BROS. CORPORATION, a Delaware corporation, which is about to file with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Act of 1933, as amended, a Registration Statement on Form S-8 for the registration of certain of its securities for offering and sale pursuant to the Greif Bros. 401(k) Retirement Plan and Trust, hereby constitutes and appoints Michael J. Gasser and William B. Sparks, Jr., and each of them, as his true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign such Registration Statement and any and all amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and The Nasdaq Stock Market, granting unto each of said attorneys-in-fact and agents, and substitute or substitutes, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all things that each of said attorneys-in-fact and agents, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this 29th day of February, 2000. /s/ William B. Sparks, Jr. William B. Sparks, Jr.