Alien astronauts
By: Gary L. Blackwood.
Series: Secrets of the unexplained
Publisher: Benchmark Books
Published: 1999
Place of publication: New York
Language: eng
Subjects: Unidentified flying objects -- Juvenile literature; Unidentified flying objects
Description: Discusses the existence of unidentified flying objects and explanations for various sightings throughout history.
Notes: Includes index.