@book{27510,
	author = {University of Arizona. and Allen, Milton Arthur,},
	title = {Arizona gold placers and placering},
	publisher = {University of Arizona},
	year = {[1937]},
	series = {Its bulletin},
	address = {Tucson, Ariz.,},
	edition = {(4th ed., reprinted 1937)},
	note = {University of Arizizona bulletin, v. 8, no. 2.}
}