@book{218621,
	title = {ShakeMaps},
	publisher = {U.S. Dept. of the Interior, U.S. Geological Survey},
	year = {1971-},
	address = {Reston, Va.},
	note = {Title from HTML home page last update April 3, 2008(viewed on April 3, 2008).},
	url = {http://purl.access.gpo.gov/GPO/LPS88703}
}