Report on the Geological survey of the state of Iowa. - Iowa Geological Survey; Hall, James, 1811-1898.; Whitney, J. D. (Josiah Dwight), 1819-1896.; Worthen, Amos Henry, 1813-1888. (Des Moines, Printed by C. Van Benthuysen, 1858)
Vol. 2 never published.
Keywords: Geology -- Iowa; Geology, Economic; Paleontology -- Iowa