@book{27909,
	author = {Calkins, Frank C. and Butler, B. S.},
	title = {Geology and ore deposits of the Cottonwood-American Fork Area, Utah /},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1943.},
	address = {Washington :},
	note = {At head of title: U.S. Dept. of the Interior, Harold L. Ickes, secretary.  Geological survey, W. E. Wrather, director ...}
}