Concept
Alien artifacts
Catalogue
- Books
The humanoids / Aimé Michel, Jacques Vallée, Gordon Creighton, Coral Lorenzen, Antonio Ribera, Charles Bowen.
Date: [1969]- Books
Operation Trojan Horse : an exhaustive study of unidentified flying objects, revealing their source and the forces that control them / John A. Keel.
Keel, John A., 1930-2009Date: 1973