Shows mines working and idle. Relief shown by shading. "No. 11." Annotations in ink, colored ink, pencil, and colored pencil and mounted on cloth backing. Appeared in: Its Atlas geográfico de la República mexicana ... 1930, no. 11. Available also through the Library of Congress Web site as a raster image.
Mexico. Dirección De Estudios Geográficos Y Climatológicos
1922
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