1969 NASA Authorization1969 NASA Authorization, BookPart 4 : Hearings Before the United States House Committee on Science and Astronautics, Subcommittee on Advanced Research and Technology, Ninetieth Congress, Second Session, on Feb. 19-22, 26-29, 1968
1969 NASA Authorization1969 NASA Authorization, BookPart 3 : Hearings Before the United States House Committee on Science and Astronautics, Subcommittee on Space Science and Applications, Ninetieth Congress, Second Session, on Feb. 19-21, 26-29, 1968