@book{4883,
	author = {Vásquez Torre, Guadalupe Ana María and Valderrama, Margarita Cruz},
	title = {Ecología y formación ambiental},
	publisher = {McGraw-Hill},
	year = {1993},
	address = {México :},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/L128181.jpg}
}