Thuvia, Maid of Mars (Ace) Captive of the Green Barbarians! This exact book can be downloaded here via
The Master Mind of Mars (1963) An American faces the super-science of Barsoom’s strangest savant With frontpiece, also by Roy Krenkel via via via
The Moon Maid This story was also published in Argosy, with a fantastic cover by P. J. Monahan via via via
The Land of Hidden Men (Original Title: Jungle Girl) Adventure in the lost city of a secret kingdom via
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