@book{23476,
	author = {Kent, Harry Christison, and Rocky Mountain Association of Geologists.},
	title = {Colorado geology /},
	publisher = {Rocky Mountain Association of Geologists,},
	year = {1980.},
	address = {Denver, Colo. :},
	note = {Seven fold. plans in back pocket.},
	url = {http://www.archive.org/details/coloradogeology00kent}
}