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Central Mexico: Hidalgo
Information on the Mexican states of Guerrero, Hidalgo, Mexico State, Morelos, Puebla, Tlaxcala, Veracruz, the Federal District including Mexico City.
UK Libraries has large number of resources on Mexico and its states. To find more information on the state of Hidalgo go to the library catalog, select "Library Catalog" and type in Hidalgo Mexico as a phraseto do a keyword search.