UFOs and aircraft

Jenny Randles. Something in the Air, Robert Hale, London, 1998.

MJ12

Stanton T. Friedman. Top Secret/MAJIC, Michael O'Mara, 1997.

Strange Skies

Jerome Clark. Strange Skies: Pilot Encounters with UFOs. Citadel Press, 2003.

The Cash Landrum Incident

John Schuessler, The Cash-Landrum UFO Incident. GeoGraphics Printing Company, 1998

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Dreamland

Phil Patton. Travels in Dreamland: the Secret History of Area 51. Orion Media, 1997. David Darlington. The Dreamland Chronicles: the Legends of Area 51, America's Most Secret Base. Little Brown and Co, 1998.