Outlines of geology. Being a combination of Outlines of physical geology by Chester R. Longwell, Adolph Knopf and Richard F. Flint and Outlines of historical geology, 3.ed., entirely rewritten, by Charles Schuchert and Carl O. Dunbar. - Longwell, Chester R.; Knopf, Adolph; Flint, Richard F.; Schuchert, Charles; Dunbar, Carl O. (Wiley; Chapman and Hall, 1937)