TMM BL 035
The Arroyo Formation (Leonardian Lower Permian) and Its Vertebrate Fossils, by E. C. Olson. 25 p., 13 figs., 3 tables, 1989. Print
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TMM BL 035. The Arroyo Formation (Leonardian Lower Permian) and Its Vertebrate Fossils, by E. C. Olson. 25 p., 13 figs., 3 tables, 1989.