@book{4528,
	author = {Greenwood, N. N. and Earnshaw, A.},
	title = {Chemistry of the elements /},
	publisher = {Butterworth-Heinemann,},
	year = {c1997.},
	address = {Oxford ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/description/els032/97036336.html}
}