Crandell, D.R., and Hoblitt, R.P., Lateral blasts at Mount St. Helens adn hazard zonation; Bull. Volcanol., 48, 27-37, 1986.
Drexler, J.W., Rose, W.I., Sparks, R.S.J., and Ledbetter, M.T., The Los Chocoyos Ash, Guatemala: A Major Stratigraphic Marker in MIddle America and in Three Ocean Basins; Ouatemary Research, v. 13, p. 327-345, 1980.
Duffield, W.A., Heiken, G.H., Wohletz, K.H., Maassen, L.W., Dengo, G., and McKee, E.H. , Geology and geothermal potential of the Tecuamburro volcano area of Guatemala; Geotherm. Res. Council Trans., 13:125-131, 1991.
Ford, A., and Glicken, H., The significance of volcanic ash tempering in the ceramics of the central Maya lowlands; Maya Ceramics: Papers from the 1985 Maya Ceramics Conference, edited by P.M. Rice and R.J. Sharer, BAR International Series 345, Oxford, 1987.
Ford, A., and Rose, W.I., Volcanic Ash in Ancient Maya Ceramics of the Limestone Lowlands: Implications for Prehistoric Volcanic Activity in the Guatemala Highlands; in press.
Gall, F., Cerro Quemado: Volcán de Quezaltenango; Sociedad de Geografía y Historia de Guatemala, Publicación especial no. 12, 1966.
Hoblitt, R.P., Miller, C.D., and Vallance, J.W., Origin and stratigraphy of the deposit produced by the May 18 direct blast; In: LIpman, P.W., and Mullineaux, D.R. (Editors), The 1980 eruption of Mount St. Helens; Washington, U.S. Geol. Surv. Prof. Pap 1250, 401-419.
Johns, G.W., Geology of the Cerro Quemado volcanic dome complex, Guatemala; M.S. Thesis, Michigan Technological University, HOughton, MI, 117 p, 1975.
Stuvier, M., and Pearson, G.W. , High-precision calibration of the radiocarbon time scale, AD 1950-500 BC; Radiocarbon, 28(2b), 805-838, 1986.