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2004. Instituto Nacional de Estadística, Geografía e Informática (Mexico), Geological Survey (U.S.), and Canada Centre for Remote Sensing. This polygon shapefile depicts the political boundaries of North America, including: international boundaries, provincial boundaries, state or terr... Geological Survey (U.S.).
Hijmans, Robert J. This polygon shapefile contains the second-level administrative divisions of Mexico (adm2). Level 2 divisions include municipalities. This layer is... University of California, Berkeley. Museum of Vertebrate Zoology and International Rice Research Institute.