edited by William C. Schneider ; cosponsored by American Institute of Aeronautics and Astronautics, in cooperation with National Air and Space Museum, Smithsonian InstitutionAAS Publications Office : distributed by Univeltc1977
presented at the 1975 Astrodynamics Conference sponsored by the American Astronautical Society and the American Institute of Aeronautics and Astronautics, held at Nassau, Bahamas, July 28-30, 1975 ; edited by William F. Powers ... [et al.]AAS Publications Office : distributed by Univeltc1976