@book{25271,
	author = {Emmons, William H. and Calkins, Frank Cathcart, 1878-,},
	title = {Geology and ore deposits of the Philipsburg quadrangle, Montana /},
	publisher = {U.S. Gov't. Print. Off,},
	year = {1913.},
	series = {Geological Survey (U.S.). Geological Survey professional paper ;},
	address = {Washington :}
}