United States. Congress. House. Committee on Interstate and Foreign Commerce. Subcommittee on Oversight and Investigations.
Washington : U.S. Govt. Print. Off., 1978.
United States. Congress. Senate. Committee on Labor and Human Resources.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., Congressional Sales Office, U.S. G.P.O., 1989.