@book{507,
	author = {Mays, Larry W.},
	title = {Water resources engineering /},
	publisher = {John Wiley,},
	year = {c2011.},
	address = {Hoboken, NJ :},
	edition = {2nd ed.},
	url = {https://www.wiley.com/en-pk/Water+Resources+Engineering%2C+2nd+Edition-p-9780470574164}
}