@book{27461,
	author = {Peterson, N. P.},
	title = {Geology and ore deposits of the Mammoth mining camp area, Pinal county, Arizona,},
	publisher = {University of Arizona,},
	year = {[1938]},
	series = {Arizona. Bureau of mines. Bulletin},
	address = {Tucson,},
	note = {At head of title: University of Arizona Bulletin, vol.IX, no. 2, April 1, 1938.}
}