| 1. Coahuila and Texas, 1821-1836
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| Historical index for the early political development of the region, including DeWitt Colony under Coahuila y Tejas, from Liberal Federalism to Centralist Dictatorship, 1824 Constitution and Colonization Laws. |
| http://www.tamu.edu/ccbn/dewitt/coahuilacon.htm |
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| 2. Coahuila, Mexico- WorldGenWeb
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| Volunteer project providing geneaology resources, including obituaries, background information on recordkeeping in the state, and links to maps and history. |
| http://www.rootsweb.com/~mexcoahu |
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| 3. Cuatro Cienegas de Carranza
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| Information on this unique desert aquatic ecosystem, including organisms, habitat, conservation and tourism. [English/Spanish]. |
| http://www.utexas.edu/tmm/sponsored_sites/dfc/cuatroc |
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| 4. State of Coahuila
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| Official state site, with information about tourism, investment and government. [English/Spanish]. |
| http://www.coahuila.gob.mx |
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