Author: GORDON, M.
Title: An early Reticuloceras Zone fauna from the Hale Formation in northwestern Arkansas.
Description: 1968. US Geological Survey Professional Paper 613-A; 19 pp. 12 fig./phot. 2 plts. with fossils h.t. Orig. wrps. with libr. stamp in corner of front cover, contents very good, 4to.

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