@book{258022,
	title = {Geologic maps},
	publisher = {U.S. Dept. of the Interior, Geological Survey},
	year = {1982},
	address = {Washington D.C},
	note = {G.P.O. sales statement incorrect in publication.},
	url = {http://catalog.gpo.gov/fdlpdir/locate.jsp?ItemNumber=621&SYS=000242788}
}