1969 NASA authorization. :
Hearings, Ninetieth Congress, second session, on H.R. 15086 (superseded by H.R. 15856).

APA Citation

United States. Congress. House. Committee on Science and Astronautics., United States. Congress. House. Committee on Science and Astronautics. Subcommittee on Advanced Research and Technology., United States. Congress. House. Committee on Science and Astronautics. Subcommittee on Space Science and Applications., United States. Congress. House. Committee on Science and Astronautics. Subcommittee on Manned Space Flight. (1968). 1969 NASA authorization.: Hearings, Ninetieth Congress, second session, on H.R. 15086 (superseded by H.R. 15856). Washington: U.S. Govt. Print. Off.

MLA Citation

United States. Congress. House. Committee on Science and Astronautics, United States. Congress. House. Committee on Science and Astronautics. Subcommittee on Advanced Research and Technology, United States. Congress. House. Committee on Science and Astronautics. Subcommittee on Space Science and Applications, and United States. Congress. House. Committee on Science and Astronautics. Subcommittee on Manned Space Flight. 1969 NASA Authorization.: Hearings, Ninetieth Congress, Second Session, On H.R. 15086 (superseded by H.R. 15856). Washington: U.S. Govt. Print. Off, 1968.

Warning: These citations may not always be complete (especially for serials).