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Are you Adolphus Langenscheidt, author of the books below?
Historia mínima de la minería en la Sierra Gorda by Adolphus Langenscheidt Investigaciones recientes sobre la lítica arqueológica en Méx... by Adolphus Langenscheidt Rocas y minerales del México antiguo by Miguel León-Portilla La Sierra Gorda de Querétaro by Margarita Velasco Mireles


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