"GAO-01-970R." "July 20, 2001." Paper version available from the General Accounting Office. Title from title screen.
Includes bibliographical references.
Mode of access: Internet from the GPO Access web site. Address as of 10/22/01: http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=gao&docid=f:d01970r.pdf; current access is available via PURL. System requirements: Adobe Acrobat Reader.