Observer Effect
From Author Wars - https://authorwars.com/books/observer-effect-844887.html
Overview:
- Title: Observer Effect
- Author: John W. Campbell
- Year: 1966
- Type: Essays
Editions/Publications:
- Unknown. Analog Science Fiction/Science Fact, June 1966 (Unknown, John W. Campbell, Condé Nast, $0.50, 164 pages, digest, MAGAZINE)