@book{50802,
	author = {Harrison, Roy M., and Royal Society of Chemistry (Great Britain)},
	title = {Understanding our environment},
	publisher = {Royal Society of Chemistry,},
	year = {c1999.},
	address = {Cambridge, U.K. :},
	edition = {3rd ed.},
	note = {Previous ed.: 1992.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10626396}
}