00303nam a2200121Ia 4500008004100000100001200041245004600053260003200099300001000131650000700141650002100148700001200169220216s9999    xx            000 0 und d  aPal T K 0aNatural rubber vis-a-vis synthetic rubber  bRubber Board Bulletinc2006  a33-38  aNR  aSynthetic rubber  aDey S K