20 1 10 Kabul Pamin Additional Author Z. Poeloengan Additional Author Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Purboyo Guritno Additional Author Eka Nuryanto Additional Author Endang Syamsuddin Additional Author Rolettha Y. Purba Additional Author Tjahjono Herawan Additional Author Rachmat Adiwiganda Additional Author Hasril Hasan Siregar Additional Author Angga Jatmika Additional Author Supriyadi Sadi Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 1997 cover_warta_vol5no3.jpg Kabul Pamin Additional Author Z. Poeloengan Additional Author Adlin U. Lubis Additional Author A. Purba Additional Author PUSAT PENELITIAN KELAPA SAWIT Additional Author A. Sipayung Additional Author P. Purba Additional Author Rolettha Y. Purba Additional Author P. Girsang Additional Author E. Manalu Additional Author Arief Priyambodo Additional Author Nugroho Kusnohadi Additional Author Rohayati Suprihartini Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 1995 Cover_Warta_PPKS_Vol_3_No_3.jpg Pusat Penelitian Kelapa Sawit (PPKS) Additional Author SUGIYONO Additional Author Wahyono, Teguh Additional Author Heri Santoso, Winarna Additional Author Arsyad D. Koedadiri, Rolettha Y. Purba, P. Purba Additional Author Eka Nuryanto, Tri Haryati Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2004 cover_warta_vol12no13.jpg Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Luqman Erningpraja Additional Author SUGIYONO Additional Author Rolettha Y. Purba, Sudharto Prawirosukarto, danR. Desmier de Chenon Additional Author Lalu Firman Budiman, Dwi Asmono, Edi Suprianto Additional Author Sugiyono, Arsyad D. Koedadiri, Syamsul Anwar Additional Author E.S. Sutarta, Winarna Additional Author Agus Susanto, Rolettha Y. Purba, Sudhartp Ps Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2002 cover_warta_vol10no2-3.jpg Hama-Hama Kelapa Sawit = Buku 1 Serangga hama kelapa sawit. Sudharto Prawirosukarto Primary Author PUSAT PENELITIAN KELAPA SAWIT Additional Author Rolettha Y. Purba Primary Author Agus Susanto Primary Author mixed material Medan PPKS 2005 12584.jpg.jpg Elaeidobius Kamerunicus : Serangga Penyerbuk Kelapa Sawit PUSAT PENELITIAN KELAPA SAWIT Additional Author Rolettha Y. Purba Primary Author Agus Susanto Primary Author Agus Eko Prasetyo Primary Author mixed material 9789798529788 Medan Pusat Penelitian Kelapa Sawit (PPKS ) 2007 12845.jpg.jpg Pestisida di Perkebunan Kelapa Sawit PUSAT PENELITIAN KELAPA SAWIT Additional Author Rolettha Y. Purba Primary Author Agus Susanto Primary Author Agus Eko Prasetyo Primary Author Azhar Fadillah Lubis Primary Author Ahmad P. Dongoran Primary Author mixed material 9789798529795 Medan PPKS 2008 12846.jpg.jpg Hama-Hama Kelapa Sawit = Buku 2 Hama-hama Vertebrata kelapa sawit. PUSAT PENELITIAN KELAPA SAWIT Additional Author Rolettha Y. Purba Primary Author Sudharto Ps Primary Author Agus Susanto Primary Author mixed material Medan PPKS 2005 12585.jpg.jpg Penyakit - Penyakit Pada Kelapa Sawit = Buku 2 Penyakit-penyakit non infeksi pada kelapa sawit. PUSAT PENELITIAN KELAPA SAWIT Additional Author Rolettha Y. Purba Primary Author Agus Susanto Primary Author Akiyat Primary Author mixed material Medan PPKS 2005 12563.jpg.jpg Penyakit-penyakit Pada Kelapa Sawit = Buku 1 Penyakit-penyakit infeksi pada kelapa sawit. PUSAT PENELITIAN KELAPA SAWIT Additional Author Rolettha Y. Purba Primary Author Agus Susanto Primary Author Condro Utomo Primary Author mixed material Medan PPKS 2005 12562.jpg.jpg