@book{25742,
	author = {Schrader, Frank Charles, and Stone, Ralph W.},
	title = {Useful minerals of the United States,},
	publisher = {Govt. print. off.,},
	year = {1917.},
	series = {United States. Geological survey. Bulletin 624},
	address = {Washington,},
	note = {At head of title: Department of the interior.}
}