U.S. G.P.O. : For sale by the Supt. of Docs., Congressional Sales Office, U.S. G.P.O.,
Kruger, Lennard G.
Library of Congress. Congressional Research Service.
United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Science, Research, and Technology.
prepared by the Congressional Research Service, Library of Congress for the Subcommittee on Science, Research, and Technology ; transmitted to the Committee on Science, Space, and Technology, House of Representatives, One Hundred First Congress, first session.