Proving Ground
From Author Wars - https://authorwars.com/books/proving-ground-1292194.html
Overview:
- Title: Proving Ground
- Author: Harry Turner
- Year: 1957
- Type: Interior Art
Editions/Publications:
- Unknown. Nebula Science Fiction, Number 24 (Unknown, Harry Turner, Peter Hamilton, 2/-, 112 pages, digest, MAGAZINE)