UFO Book:
“The Challenge of Unidentified Flying Objects”
by Professor C. A. Maney and Richard H. Hall
(NICAP.org)

The book was published in 1961:

http://www.nicap.org/books/coufo/coufo_complete.htm












The late Richard H. Hall, former NICAP Assistant Director,
UFO Author & Researcher

(nicap.org image)

UFO Website:
“Barry Greenwood UFO Archive”

On this website, Barry J. Greenwood presents publications and inventories:

http://www.greenwoodufoarchive.com/

Barry J. Greenwood,
U.S. UFO Author & Researcher

UFO Web Page:
“Project Blue Book Research Center” (NICAP.org)

The Project Blue Book Research Center is run by Michael David Hall:

http://www.nicap.org/bluebook/blue.htm

Michael David Hall,
U.S. Historian & UFO Researcher
(nicap.org photo)