@book{19713,
	author = {Ander-Egg, Ezequiel.},
	title = {El desafío ecológico},
	publisher = {EUNED,},
	year = {1985},
	address = {San José, C.R., :},
	note = {Esta obra corresponde al cap. III del libro "El mundo en que vivimos", 14 ed. corr. y aum.}
}