. . . . . . . "Electronic books"@en . . . "1986 NASA authorization hearing before the Subcommittee on Transportation, Aviation, and Materials of the Committee on Science and Technology, U.S. House of Representatives, Ninety-ninth Congress, first session"@en . . "1986 NASA authorization : hearing before the Subcommittee on Transportation, Aviation, and Materials of the Committee on Science and Technology, U.S. House of Representatives, Ninety-ninth Congress, first session"@en . . . . . . .