Published by Printed for the Society, Cambridge, 1957
Seller: JF Ptak Science Books, Hendersonville, NC, U.S.A.
Soft cover. Condition: Very Good. G. Leitmann, "On the Equation of Rocket Motion" in the Journal of the Interplanetary Society, edited by G.V.E. Thompson, London, Vol 16 no. 3 no. 76, July-September 1957, pp 133-196 with the Leitmann on pp 141-148. Also bound with Derek Lawden,The Simulation of Gravity" pp 141-147, and other contributions. Original wrappers. Original owner's rubber stamp on front cover top left corner. Nice copy. 714.3.