1. General Dynamics/Convair. "Manned Mars and Venus Exploration Study, Final Report." Volume 1: Summary Technical Report, report No. GD | C AOK 65-002-1, NASA Contract NAS8-11327, 8June 1965, p. 1-4, 13, 37, 56, 60 (Located inthe JSCHistoryCollection, JSCFiles: Manned MarsMissionStudies,Box4).