@book{196926,
	author = {Battaglia, M. and Geological Survey (U.S.)  },
	title = {The Long Valley Caldera GIS database},
	publisher = {U.S. Dept. of the Interior, U.S. Geological Survey},
	year = {2003.},
	series = {Digital data series},
	address = {[Reston, Va.]},
	note = {Title from title screen.},
	url = {http://pubs.usgs.gov/dds/dds-81/}
}