@book{7804,
	author = {Harrison, Lee},
	title = {Manual de auditoría medioambiental},
	publisher = {McGraw-Hill},
	year = {1996},
	address = {Madrid :},
	edition = {2a. ed.},
	url = {http://www.biblioeco.unsa.edu.ar/pmb/images/libros/L129373.jpg}
}