by United States. General Accounting Office
Cover title.
Distributed to depository libraries in microfiche.
Shipping list no.: 93-0972-M.
"May 1993."
"GAO/GGD-93-67."
"B-251900"--P. 1.
Includes bibliographical references.
Microfiche. [Washington, D.C.] : U.S. General Accounting Office, [1993] 1 microfiche : negative.