@book{280361,
	author = {United States. and United States.},
	title = {GAO's study of the national park system :},
	publisher = {U.S. Government Printing Office,},
	year = {1995.},
	series = {S. hrg. ;},
	address = {Washington :},
	note = {CRDP Program record.},
	url = {https://purl.fdlp.gov/GPO/gpo117797}
}