@book{12125,
	author = {Velázquez de Castro, Federico},
	title = {Educación ambiental},
	publisher = {Narcea},
	year = {1995},
	series = {Materiales 12-16 para educación secundaria. Temas transversales},
	address = {Madrid},
	edition = {1ª ed.},
	note = {Apoyos documentales a la educación ambiental: p. 145-149}
}