@book{69435,
	author = {Programa de las Naciones Unidas para el Medio Ambiente},
	title = {Las arenas del camino},
	publisher = {PNUMA,},
	year = {[s.f.]},
	series = {PNUMA. Dossierambiental},
	address = {Nairobi, Kenia :},
	note = {34-89}
}