00348nam a2200109Ia 4500008004100000100002000041245008700061260003200148300001100180650001900191650002800210220216s9999    xx            000 0 und d  aBarnard Douglas 0aNew ways with natural : Natural rubber is being modified to enhance its properties  bRubber Board Bulletinc1982  a11-Aug  aNatural rubber  aPowdered Natural rubber