Evolution's End
From Author Wars - https://authorwars.com/books/evolutions-end-1277684.html
Editions/Publications:
- Unknown. Thrilling Wonder Stories, April 1941 (Unknown, Leo Morey, Better Publications, Inc., $0.15, 132 pages, pulp, MAGAZINE)
From Author Wars - https://authorwars.com/books/evolutions-end-1277684.html