From 1943 on , he was the representative of Spain in the European Secretariat of the Fourth International .
Within the POI , he was one of the leaders of the GTE , which gathered together the Spanish members of the Fourth International .
From 1943 on , one was the one of Spanish in the European Secretariat of the Fourth International .
Within the POI , he was one of the leaders of the GTE , which gathered together the Spanish members of the Fourth International .