00331nam a2200109Ia 4500008004100000100001600041245008800057260003200145300001000177650002300187650001100210220216s9999    xx            000 0 und d  aCherian P P 0aDo advanced rubber planting materials shorten immaturity ? Analysis of further data  bRubber Board Bulletinc1989  a25-26  aPlanting materials  aRubber