@book{5060,
	author = {López Ornat, Arturo.},
	title = {Estudios preliminares de la Reserva de la Biósfera ZIYAN CAAN},
	publisher = {Centro de Investigaciones de Quintana Roo,},
	year = {1983},
	address = {Puerto Morelos, Q.R. :},
	note = {55-195}
}