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Back to the stone age.

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Bibliographic Details
Main Author: Burroughs, Edgar Rice, 1875-1950
Format: Book
Language:English
Published: New York : Ace Pub. Corp., [1937]
Series:Ace science fiction classic
Description
Item Description:Originally published under the title, Seven Worlds to Conquer, in Argosy magazine, Jan. 9-Feb. 13, 1967.
Physical Description:221 pages ; 17 cm.