5 1 10 Z. Poeloengan Additional Author Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Subronto Primary Author Sudharto Prawirosukarto Additional Author Asmono, Dwi Primary Author JENNY Elisabeth Additional Author SUGIYONO Primary Author SUTARTA, Edy Sigit Primary Author Pamin, Kabul Primary Author GINTING, Gale Primary Author POELOENGAN, Z Primary Author Suprianto, Edy Primary Author Guritno, Purboyo Primary Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 1999 cover_warta_vol7no1.jpg Daswir Primary Author Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Pamin, Kabul Primary Author POELOENGAN, Z Primary Author Djamin, Arifin Primary Author Purba, Petrus Primary Author Naibahao, P. M. Primary Author Hutomo, Tri Primary Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 1995 Cover_Warta_PPKS_Vol_3_No_2.jpg Daswir Additional Author Z. Poeloengan Additional Author Adlin U. Lubis Additional Author Pusat Penelitian Kelapa Sawit (PPKS) Additional Author PUSAT PENELITIAN KELAPA SAWIT Primary Author POELOENGAN, Z Primary Author Djamin, Arifin Primary Author Purba, Petrus Primary Author Naibahao, P. M. Primary Author Hutomo, Tri Primary Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 1995 cover_warta_vol3no1.jpg POELOENGAN, Z Primary Author Hutomo, Tri Primary Author Djamin, A Primary Author Guritno, P Primary Author mixed material 9798529111 Medan Indonesian Oil Palm Research Institute (IOPRI) 1996 2200229_42_11zon.jpeg.jpeg POELOENGAN, Z Additional Author mixed material Medan PPKS 1996