Title: Congreso Obrero de 1876
Subjects: Congreso Obrero (1876 : Mexico City, Mexico), History, Working class, Congreso Obrero (1876 : Mexico City, Mexico) (uri) http://id.loc.gov/authorities/names/n81061315 (uri) http://viaf.org/viaf/sourceID/LC|n81061315
Places: Mexico