Tourism, ecotourism and protected areas : the state of nature-based tourism around the world and guidelines for its deve - Ceballos-Lascuráin, Héctor (Gland; Cambridge : IUCN, 1996)
Keywords: CONSERVACION DE LA NATURALEZA; TURISMO ECOLOGICO; RESERVAS NATURALES; CONSERVACION DE LOS RECURSOS NATURALES; MEDIO AMBIENTE NATURAL; AREAS DE RESERVAS