@book{29534,
	author = {Montana Bureau of Mines and Geology. and Heinrich, E. William},
	title = {Pre-Beltian geology of the Cherry Creek and Ruby Mountains areas,  southwestern Montana.},
	publisher = {Montana School of Mines; [for sale by Montana Bureau of Mines and Geology]},
	year = {1960.},
	series = {Its Memoir},
	address = {Butte,}
}