@online {127,
	title = {National Geologic Map Database},
	publisher = {USGS},
	abstract = {Search here first for any and all geologic map data for the Commonwealth before searching the links below.},
	keywords = {$\#$MapDatabase, $\#$MapsDataPublications, catalog, data, database, GEOLOGIC MAP, index, maps},
	url = {http://ngmdb.usgs.gov/}
}
