@book{30374,
	author = {Geological Survey (U.S.) and United States.},
	title = {Mineral resources of the Appalachian region,},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1968.},
	series = {Professional paper},
	address = {Washington,},
	note = {Part of illustrative matter fold. in pocket.}
}