@book{149113,
	author = {Earth Science Information Center U.S.},
	title = {1:100,000-scale digital line graph (DLG) data},
	publisher = {U.S. Dept. of the Interior, U.S. Geological Survey},
	year = {1991-},
	address = {Reston, VA},
	edition = {Standard Format. March 1993.},
	note = {Title from disk label.}
}