EXHIBIT 23
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
  As independent public accountants, we hereby consent to the incorporation of
our report included in this Form 10-K, into the Company's previously filed
Registration Statements: Registration Statement No. 33-54264; Registration
Statement No. 33-52842; Registration Statement No. 33-52840; Registration
Statement No. 33-45444; Registration Statement No. 33-44076; Registration
Statement No. 33-42940; Registration Statement No. 33-41385; Registration
Statement No. 33-35307; Registration Statement No. 33-33634; Registration
Statement No. 33-23466; Registration Statement No. 33-18387; Registration
Statement No. 33-14836; Registration Statement No. 2-73935; Registration
Statement No. 2-59558; Registration Statement No. 2-56121; Registration
Statement No. 2-51552; Registration Statement No. 2-49851; Registration
Statement No. 2-46237; Registration Statement No. 33-66622; Registration
Statement No. 33-70822; and Registration Statement No. 33-54545.
 
Arthur Andersen LLP
 
Washington, D.C.
March 29, 1995
 
                                      E-5