The Mississippi river and valley. Bibliography, mostly non-technical

Chicago citation style
U.S. Army Engineer School. Library. The Mississippi river and valley. Bibliography, mostly non-technical. 1931. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/002567846. (Accessed December 15, 2018.)
APA citation style
U.S. Army Engineer School. Library, (1931) The Mississippi river and valley. Bibliography, mostly non-technical. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/002567846
MLA citation style
U.S. Army Engineer School. Library. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/002567846>.
Note: These citations are programmatically generated and may be incomplete.