@book{950,
	author = {Chiras, Daniel D.},
	title = {Environmental science :},
	publisher = {Benjamin Cummings, },
	year = {c1990},
	address = {Redwood City, CA :},
	edition = {3 ed.},
	url = {https://www.cicy.mx/sitios/sib/doctoelectronico/961.pdf}
}