00293nam a2200097Ia 4500008004100000100001700041245004200058260006500100300001000165650002000175220216s9999    xx            000 0 und d  aYogaratnam N 0aSustainability of the rubber industry  bBulletin of the Rubber Research Institute of Sri Lankac2004  a39-44  aRubber industry