POWER OF ATTORNEY KNOW EVERYONE BY THESE PRESENTS, that each director whose signature appears below constitutes and appoints E. H. Creese and B. G. Kelley, jointly and severally, his attorneys-in-fact, each with the power of substitution, for him in any and all capacities related to entering his personal identification number onto the EDGAR online reporting system and transmitting the 1993 Form 10-K (annual report pursuant to Section 13 or 15(d) of the Securities and Exchange Act of 1934) and all other required filings, until the 1993 annual meeting of shareholders, to the Securities and Exchange Commission, and hereby ratifies and confirms all that each of said attorneys-in-fact, or his substitute or substitutes, may do or cause to be done by virtue hereof. SIGNATURE TITLE - --------- ----- /s/ George C. Carpenter III - ------------------------------------ George C. Carpenter III Director /s/ David J. Fisher - ------------------------------------ David J. Fisher Director /s/ Bruce G. Kelley - ------------------------------------ Bruce G. Kelley Director /s/ Robb B. Kelley - ------------------------------------ Robb B. Kelley Chairman of the Board of Directors and Director /s/ George W. Kochheiser - ------------------------------------ George W. Kochheiser Director /s/ Raymond A. Michel - ------------------------------------ Raymond A. Michel Director /s/ Therese M. Vaughan - ------------------------------------ Therese M. Vaughan Director May 24, 1993 130