U.S. G.P.O. : For sale by the Supt. of Docs., Congressional Sales Office, U.S. G.P.O.,
Future goals in space : hearings before the Subcommittee on Space Science and Applications of the Committee on Science, Space, and Technology, U.S. House of Representatives, One Hundredth Congress, second session, February 1, 5, 1988.
United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Space Science and Applications.
Future goals in space : hearings before the Subcommittee on Space Science and Applications of the Committee on Science, Space, and Technology, U.S. House of Representatives, One Hundredth Congress, second session, February 1, 5, 1988.