@book{29065,
	author = {Simons, Frank S. and Mapes Vázquez, Eduardo,},
	title = {Geology and ore deposits of the Zimápán mining district,},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1956.},
	address = {Washington,},
	note = {Part of illustrative matter in pocket.}
}