00311nam a2200085Ia 4500008004100000100002100041245003800062260010600100650001900206220216s9999    xx            000 0 und d  aSulkowski George 0aRubber trading in the new century  bProceedings of the International Rubber Forum Boca Del Rio, Veracruz, Mexico 7-8 October 1999.p93-100  aRubber trading