@book{4726,
	author = {Rao, Venugopala.},
	title = {Textbook of environmental engineering /},
	publisher = {Prentice-Hall of India Pvt.Ltd,},
	year = {2004.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/8120319303/chopaconline-20}
}