Wim van Utrecht

title	ISBN-13 (ISBN-10)	year of publica- tion	other author(s)
Unidentified Aerial Object Photographed Near Zwischbergen, Switzerland, on July 26, 1975: a Case Analysis	978-9O-8O222O-1-4 (9O-8O222O-1-1)	1995	Frits van der Veldt