Xylon 48: Well-known and unknown flying objects: 7: Ground control to Callisto

MLA

Hoorne, Emiel. Xylon 48: Well-known and Unknown Flying Objects: 7: Ground Control to Callisto. 1979.

APA

Hoorne, E. (1979). Xylon 48: Well-known and unknown flying objects: 7: Ground control to Callisto. .

Chicago

Hoorne, Emiel Xylon 48: Well-Known and Unknown Flying Objects: 7: Ground Control to Callisto.