Proceedings of the sixth annual meeting of the Working Group on Extraterrestrial Resources

"This volume contains the proceedings of the Seventh Annual Meeting of the Working Group on Extraterrestrial Resources, which was held in conjunction with the Joint National Meeting of the American Astronautical Society (AAS) and the Operations Research Society (ORSA) on June 17-20, 1969, in Denver, Colorado. The Working Group on Extraterrestrial Resources (WGER) is composed of scientists and engineers from the National Aeronautics and Space Administration, U.S. Air Force, U.S. Army, and the U.S. Bureau of Mines who have active interest in the utilization of extraterrestrial resources."--Page iii.