For Your Information: Earth Tunnels

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Overview:

Title: For Your Information: Earth Tunnels
Author: Willy Ley
Year: 1953
Type: Essays
Series: For Your Information

Variant Titles:

1956. Gravitation

Editions/Publications:

Unknown. Galaxy Science Fiction, October 1953 (Unknown, Willy Ley, Galaxy Publishing Corporation, $0.35, 164 pages, digest, MAGAZINE)
Unknown. Galaxy Science Fiction [UK], v3 #12 (Unknown, Willy Ley, Strato Publications, 1/6, 132 pages, digest, MAGAZINE)