@book{11444,
	author = {Rao, P. Venugopala.},
	title = {Principles of Environmental Science and Engineering },
	publisher = {Prentice-Hall of India Pvt.Ltd,},
	year = {2006.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/8120328930/chopaconline-20}
}