@book{25900,
	author = {Loughlin, G. F.},
	title = {The oxidized zinc ores of Leadville, Colorado,},
	publisher = {Govt. print. off.,},
	year = {1918.},
	series = {U.S. Geological survey. Bulletin},
	address = {Washington,},
	note = {At head of title: Department of the interior.}
}