@book{15431,
	author = {Gordon, Paul,},
	title = {Bighorn Canyon /},
	publisher = {Falcon Press Pub.,},
	year = {c1990.},
	address = {Helena, Mont. :},
	note = {On cover: Bighorn Canyon National Recreation Area.},
	url = {http://www.archive.org/details/bighorncanyon00gord}
}