Notes on the geology of the survey for the extension of the Union Pacific railway, E. D., from the Smoky Hill river, Kansas, to the Rio Grande. - Le Conte, John Lawrence, 1825-1883.; Union Pacific Railroad Company; Genth, F. A. (Frederick Augustus), 1820-1893. (Philadelphia [Review printing house], 1868)
"Catalogue of rocks, by Dr. F. A. Genth": p. 69-76.
Keywords: Geology -- West (U.S.)