New York: American Astronautical Soc. 1965. First? Edition. First? Printing. 979, illus., diagrams, usual library markings. Volume 19 of Advances in the Astronautical Sciences. Proceedings of the American Astronautical Society Symposium on Unmanned Exploration of the Solar System, February 8-10, 1965, Denver, Colorado. Condition: good, ex-lib.
Keywords: Harold Urey, Unmanned Spacecraft, Space Exploration, Launch Vehicles, Space Probes, Satellites