@book{17152,
	author = {Hawkins, Keith.},
	title = {Environment and enforcement :},
	publisher = {Clarendon Press ;},
	year = {c1984.},
	address = {Oxford :},
	note = {Includes indexes.},
	url = {http://www.loc.gov/catdir/enhancements/fy0637/83008230-d.html}
}