Space War

From Author Wars - https://authorwars.com/books/space-war-114387.html

Overview:

Title: Space War
Author: Willy Ley
Year: 1939
Type: Essays

Editions/Publications:

Unknown. Astounding Science-Fiction, August 1939 (Unknown, Willy Ley, Street & Smith Publications, Inc., $0.20, 164 pages, pulp, MAGAZINE)
Unknown. Coming Attractions (Unknown, Willy Ley, Gnome Press, $3.50, 254 pages, Hardcover, Anthology)