References Cited

McBirney, A. R., and H. Williams, Volcanic history of Nicaragua, Univ. Calif. Publ. Geol. Sci., 55, 1-65, 1965.

Meyer-Abich, H., Los Volcanes Activos do Guatemala y El Salvador, Anales Serv. Geol. Nacl. El Salvador Bd.,3, 49-62, 1956.

Mooser, F., H. Meyer-Abich, and A. R. McBirney, Catalogue of the Active Volcanoes of the World, Part 6, Central America, International Volcanological Association, Naples, 1958.

Simkin, Tom and Siebert, Lee, 1994. Volcanoes of the World. Geoscience Press,Inc., Tucson, Arizona, p134.

West, R.C., and Augelli, J.P. Middle America: It's Lands and Peoples. Prentice Hall: New Jersey, 1966.

Williams, H., and H. Meyer-Abich, Volcanism in the Southern Part of El Salvador With Particular Reference to the Collapse basins of Lakes Coatepeque and Ilopango, Univ. Calif. Publ. Geol. Sci., vol 32, 1-64, 1955