@book{26823,
	author = {Matthes, François Emile,},
	title = {Geologic history of the Yosemite valley,},
	publisher = {U.S. Govt. print. off.,},
	year = {1930.},
	series = {U. S. Geological survey. Professional paper 160},
	address = {Washington,},
	note = {At head of title: United States Department of the Interior.}
}