@book{24271,
	author = {Ransome, F. L. and Cross, Whitman,},
	title = {A report on the economic geology of the Silverton quadrangle, Colorado /},
	publisher = {Govt. Print. Off.,},
	year = {1901.},
	series = {U.S. Geological survey. Bulletin},
	address = {Washington,},
	note = {Subject series : A, Economic geology, 12.}
}