Luis Diaz | _____ Mayan Piramids
Centro de Investigacion y de | |_|_|_| and
Estudios Avanzados del IPN. | _/_______\_ the God
Grupo de Corrosion. | _/`__________\_
A.P. 73, Suc. Cordemex. | _/`______________\_ "Kukulcan"
Merida, Yucatan, Mexico | ~"\_/`_________________ \_
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My views are expressed here, not of CINVESTAV.