@book{7948,
	author = {Das, R.C.  and Bhera, D.K},
	title = {Environmental Science},
	publisher = {PHI Learning Private Limited,},
	year = {2013.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/B00DVNUNG4/chopaconline-20}
}