@book{529115,
	author = {Steel, E.W. and Steel, E. W.},
	title = {Water supply and sewerage /},
	publisher = {National Book Foundation,},
	year = {c1991.},
	address = {Islamabad :},
	edition = {6th ed.},
	note = {Rev. ed of: Water supply and sewerage / E.W. Steel, Terence J. McGhee.}
}