Search results: DC.title:Comisiones, AND DC.title:Grupos AND DC.title:de AND DC.title:Trabajo AND DC.title:y AND DC.title:Grupos AND DC.title:de AND DC.title:Estudio AND DC.title:de AND DC.title:la AND DC.title:UGI, AND DC.title:entre AND DC.title:1984 AND DC.title:y AND DC.title:1986