Valley of Invisible Men
From Author Wars - https://authorwars.com/books/valley-of-invisible-men-1288653.html
Overview:
- Title: Valley of Invisible Men
- Author: Robert Fuqua
- Year: 1939
- Type: Interior Art
Editions/Publications:
- Unknown. Science Fiction Adventure Classics, November 1972 (Unknown, Robert Fuqua, Ultimate Publishing Co., Inc., $0.60, 132 pages, digest, MAGAZINE)
- Unknown. Amazing Stories, March 1939 (Unknown, Robert Fuqua, Ziff-Davis Publishing Company, $0.20, 148 pages, pulp, MAGAZINE)