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Pedro Narciso Arata Firma.svg Pedro Arata an Argentine pharmacist chemist and professor Pedro Arata un farmacutico qumico profesor argentino PedroNarcisoArataFirma UTC PedroNarcisoArataFirma derivative work Mr Ajedrez talk Vector graphic Mr Ajedrez PedroNarcisoArataFirma PDold Original upload log This image is derivative