Geahča maid: Endangered birds of the world:
- Endangered mammals of the world: report on status and action treatment /
- Convention on International Trade in Endangered Species of wild Fauna and Flora: Proceedings of the special working session of the conference of the parties /
- Threatened swllowtail butterflies of the world /
- The Life of birds
- Guidelines for legislation to implement cites /
- La ineficacia de la legislación salvadoreña que regula la preservación de las especies en peligro de extinción que habitan el Parque Nacional El Imposible /