Shumard, B. F. (1858). Notice of New Fossils from the Permian Strata of New Mexico and Texas, collected by Dr. George G. Shumard, Geologist of the United States Government Expedition for obtaining Water by means of Artesian Wells along the 32nd Parallel, under the direction of Capt. John Pope. Transactions of the Academy of Science of St. Louis. 291-297.
300093
Shumard, B. F.
1858
Notice of New Fossils from the Permian Strata of New Mexico and Texas, collected by Dr. George G. Shumard, Geologist of the United States Government Expedition for obtaining Water by means of Artesian Wells along the 32nd Parallel, under the direction of Capt. John Pope
Transactions of the Academy of Science of St. Louis