@book{26490,
	author = {Leighton, Morris M. and MacClintock, Paul,},
	title = {Pleistocene studies:},
	publisher = {Schnepp & Barnes, Printers]},
	year = {1926.},
	address = {Urbana, Ill.},
	note = {At head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey.}
}