Willy Ley.
Rockets and space travel: the future of flight beyond the stratosphere.
R573232. Rockets and space travel: the future of flight beyond the stratosphere. By Willy Ley. NM: chap. 8-9, appendix 1, new appendix notes, additions & revisions. © 26Feb47; A11115. Olga Ley (W); 18Mar74; R573232.
Olga Ley|W