Author: Cooper, G.A., et al., 1953.:
Title: Permian fauna at El Antimono, Western Sonora, Mexico.
Description: [Smithson. Misc. Coll., 119(2).] Washington. Pp. iv,111, numerous photos of fossils on 25 pls., 1 fold. map, index. Orig. wrs. - Almost exclusively on brachiopods.

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