1. 01. English Non Fiction Maritime UFO files / by Ledger, Don, Publication: Halifax, N.S. : Nimbus, 1998 . xiv, 162 p. : 23 cm. Date:1998 Availability: Copies available: (1), Actions:
2. 01. English Non Fiction UFOs / by Stewart, Gail B. Publication: San Diego, CA : ReferencePoint Press, 2007 . 96 p. : 24 cm. Date:2007 Availability: Copies available: (1), Actions: