(1954). The Pan American Institute of Geography and History: Its creation, development and current program, 1929-1954 : a quarter century of service to its member governments. Mexico: Paigh Publication.
Παραπομπή Chicago StyleThe Pan American Institute of Geography and History: Its Creation, Development and Current Program, 1929-1954 : A Quarter Century of Service to Its Member Governments. Mexico: Paigh Publication, 1954.
Παραπομπή MLAThe Pan American Institute of Geography and History: Its Creation, Development and Current Program, 1929-1954 : A Quarter Century of Service to Its Member Governments. Mexico: Paigh Publication, 1954.
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