@book{149212,
	author = {Schruben, Paul G. and Arndt, Raymond E. and Geological Survey (U.S.)  },
	title = {Geology of the conterminous United States at 1:2,500,000 scale},
	publisher = {U.S. Geological Survey},
	year = {1994.},
	series = {U.S. Geological Survey digital data series},
	address = {Reston, VA},
	note = {Title from title screen.}
}