@book{26867,
	author = {Perry, Eugene S.},
	title = {Ground-water in eastern and central Montana,},
	publisher = {Montana School of Mines,},
	year = {1931.},
	series = {Montana. Bureau of Mines and Geology. Memoir},
	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.}
}