00455naa a2200145 a 450000100080000000500110000800800410001910000180006024501210007826000090019965000100020865000160021870000210023477300540025520221022015-08-17       1975    bl ---       0--  u    #d1 aHARRIS, S. A.  aFurther evaluation of several promising rubber clones and rubber planting material recommendations in North Sumatra.  c1975  aClone  aSeringueira1 aSIEMONSMA, J. S.  tMenara Perkebunangv. 43, n. 5, p. 227-233, 1975.