@book{27117,
	author = {Lovering, T. S.},
	title = {Geology and ore deposits of the Breckenridge mining district, Colorado /},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1934},
	series = {Professional paper / U.S. Dept. of the Interior, Geological Survey ;},
	address = {Washington [D.C.] :},
	note = {5 maps in pocket}
}