This Fortress World

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Overview:

Title: This Fortress World
Author: Lester del Rey
Year: 1957
Type: Reviews

Editions/Publications:

Unknown. Vanguard Science Fiction, June 1958 (Unknown, Lester del Rey, Vanguard Science Fiction, Inc., $0.35, 132 pages, digest, MAGAZINE)
Unknown. Vanguard Science Fiction, June 1958 (Unknown, James E. Gunn, Vanguard Science Fiction, Inc., $0.35, 132 pages, digest, MAGAZINE)