For Your Information: When Will Worlds Collide?

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Overview:

Title: For Your Information: When Will Worlds Collide?
Author: Willy Ley
Year: 1952
Type: Essays
Series: For Your Information

Variant Titles:

1958. Wissenswertes: Welten im Zusammenstoß

Editions/Publications:

Unknown. Galaxy Science Fiction, July 1952 (Unknown, Willy Ley, Galaxy Publishing Corporation, $0.35, 164 pages, digest, MAGAZINE)
Unknown. Galaxy Science Fiction [UK], No. 26 (Unknown, Willy Ley, Strato Publications, 2/-, 132 pages, digest, MAGAZINE)