For Your Information: Who Invented the Crossbow?
From Author Wars - https://authorwars.com/books/for-your-information-who-invented-the-crossbow-661757.html
Overview:
Editions/Publications:
- Unknown. Galaxy Magazine, February 1967 (Unknown, Willy Ley, Galaxy Publishing Corporation, $0.60, 196 pages, digest, MAGAZINE)
- Unknown. Galaxy Science Fiction [UK], September-October 1967 (Unknown, Willy Ley, Gold Star Publications, 3/6, 196 pages, digest, MAGAZINE)