2. Lunar Orbiter I preliminary results; lunar terrain assessment and selenodesy, micrometeoroid, and radiation measurements. Compiled by J. Kenrick Hughes and Gerald W. Brewer Author: Hughes, J. Kenrick, compiler Format: Book Language: English Published: 1969
3. Proceedings of the sixth annual meeting of the Working Group on Extraterrestrial Resources, Aerospace Medical Division, Brooks Air Force Base, Texas, February 19-21, 1968 Author: Working Group on Extraterrestrial Resources. Meeting (6th : Brooks Air Force Base, Texas : 1968) Format: Book Language: English Published: 1968