@book{194211,
	author = {Hearn, Paul P. and Geological Survey (U.S.)  },
	title = {Global GIS database.},
	publisher = {USGS},
	year = {[2001?].},
	series = {U.S. Geological Survey digital data series},
	address = {[Flagstaff. AZ]},
	edition = {Data only version},
	note = {Title from disc label.}
}