@book{7695,
	author = {Vigil, Kenneth M.},
	title = {Clean water :},
	publisher = {Oregon State University Press, },
	year = {c2003},
	address = {Corvallis :},
	edition = {2 ed.},
	note = {Thorougly revised and updated edition of the author's 1996 book-- T.p. verso},
	url = {https://www.cicy.mx/sitios/sib/doctoelectronico/8403.pdf}
}