The GM Effect
From Author Wars - https://authorwars.com/books/the-gm-effect-207041.html
Overview:
- Title: The GM Effect
- Author: Robert Swanson
- Year: 1965
- Type: Interior Art
Editions/Publications:
- Unknown. Analog Science Fiction -> Science Fact, June 1965 (Unknown, Robert Swanson, Condé Nast, $0.50, 164 pages, digest, MAGAZINE)