@book{293829,
	author = {United States.},
	title = {Opportunities for good samaritan cleanup of hard rock abandoned mine lands :},
	publisher = {United States Government Printing Office,},
	year = {2006.},
	address = {Washington :},
	note = {"Serial no. 109-59."},
	url = {http://purl.access.gpo.gov/GPO/LPS77904}
}