Elements of astromechanics / Peter Van De Kamp. Astromechanics. Van de Kamp, Peter, 1901- Celestial mechanics. Astrodynamics. QB351 .V3 523.01 DEE "Expanded and revised presentation of two series of articles that appeared in the Journal of the Royal Astronautical Society of Canada (vol. 54, 1960; vol. 56, 1962)" Includes bibliographies. San Francisco, W.H. Freeman c1964 c1964 1964 Text (v), 140 p. : eng Golden Gate editions