BIBLIOGRAF�A

Armstead, H.C.H., Geothermal Energy. E. & F.N. Spon Ltd. Londres, 1983.

Francis, P., Volcanoes. Penguin Books Ltd. Harmondsworth, 1976.

Panczer, W.D., Minerals of Mex ico. Van Nostrand Reinhold Co. Nueva York, 1987.

Press, F. y Siever, R., The Earth. W.H. Freeman and Co. San Francisco, 1974.

Rinehart, J.S., Geysers and Geothermal Energy. SpringlerVerlag. Nueva York, 1980.