The rocks of Kansas - Swallow, G. C. (George Clinton), 1817-1899.; Hawn, F. (Frederick), 1810-1898. (St. Louis, Mo. : Geo. Knapp, printers, 1858)
"Ext. from Trans. Acad. Sci., St. Louis, Vol. I, no. 2."
Keywords: Paleontology -- Carboniferous; Paleontology -- Kansas -- Permian; Geology -- Kansas