00401nam a2200121Ia 4500008004100000100001700041245009700058260006700155300001000222650002200232650001100254650001400265220216s9999    xx            000 0 und d  aFernando D M 0aTrends in the improvement of rubber planting material with particular reference to Sri Lanka  bRubber Research Institute of Sri Lanka Quarterly Journalc1973  a84-90  aPlanting material  aRubber  aSri Lanka