UFO Phenomena and the Behavioral Scientist.
Metuchen, N.J.: The Scarecrow Press, 1979.
450pp.
ISBN 0-8108-1228-2.
Scholarly book of papers on how eyewitnesses report UFOs and what cultural factors influence UFO reports.


Advanced Aerial Devices Reported During the Korean War.
Los Altos, CA: LDA Press, 1990.
75pp.
ISBN 0-9618082-1-7.
An important study of early military UFO sightings.


Melbourne Episode: Case Study of a Missing Pilot.
Los Altos, CA: L. D. A. Press, 1987. 275pp.
ISBN 0-88229-540-3.
Detailed review and analysis of the Australian Valentich airplane abduction case.

Observing UFOs: An Investigative Handbook.
Chicago: Nelson-Hall, 1980.
300pp.
ISBN 0-88229-540-3.
Exceedingly cautious scientific study of mostly night lights and daylight discs categories of UFOs.

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