@book{4911,
	author = {Field, Barry C. and Field, Marta K.},
	title = {Economía del medio ambiente},
	publisher = {McGraw-Hill},
	year = {2003},
	address = {Madrid :},
	edition = {3a. ed.},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/L128223.jpg}
}