When Caverns Yawned

From Author Wars - http://www.authorwars.com/books/titles/218381/when-caverns-yawned/

Overview:

Title: When Caverns Yawned
Author: unsigned
Year: 1931
Type: Interior Art

Editions/Publications:

1931. Astounding Stories, May 1931 (1931, Harry Bates Reader's Guild, $0.20, 144 pages, pulp, Magazine)

Resources:

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