@book{17459,
	author = {Longwell, Chester R. and Knopf, Adolph,},
	title = {A textbook of geology :},
	publisher = {J. Wiley,},
	year = {1939.},
	address = {New York :},
	edition = {2d (rev.) ed.},
	note = {Successor to Pirsson and Schuchert's "Textbook of geology."}
}