International Biological Program: Hearings Before the Subcommittee on Science, Research, and Development of the Committee on Science and Astronautics, U.S. House of Representatives, Ninetieth Congress, First Session, on H. Con. Res. 273, May 9, June 6, July 12, August 3 and 9, 1967
United States. Congress. House. Committee on Science and Astronautics. Subcommittee on Science, Research, and Development
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