00327nam a2200109Ia 4500008004100000100002800041245007400069260003300143300001200176650001700188650001200205220216s9999    xx            000 0 und d  aSon Tran Vo Hungcet al 0aAnalysis of the technical efficiency of state rubber farms in Vietnam  bAgricultural Economicsc1993  a183-201  aRubber farms  aVietnam