@book{27021,
	author = {Clapp, C. H.},
	title = {Geology of a portion of the Rocky Mountains of northwestern Montana /},
	publisher = {Montana School of Mines,},
	year = {1932.},
	series = {Memoir / Montana Bureau of Mines and Geology,},
	address = {Butte, Mont. :},
	note = {At head of title: State of Montana. M. A. Brannon, Chancellor, the University of Montana. Bureau of Mines and Geology. Francis A. Thomson, Director.}
}