16 1 10 Ch.Hutyauruk,Sudharto Ps G.Simangunsong dan A.Sipayung Primary Author mixed material Marihat Ulu, Pematang Siantar PTP VI-VII & Puslit Marihat 1985 PT.PERKEBUNAN_VI-VII.JPG.JPG Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Arsyad D. Koedadiri Additional Author SUGIYONO Additional Author Agus Susanto, Sudharto Ps Additional Author Winarna, E.S. Sutarta Additional Author Lalang Buana, Dja\'far Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2003 cover_warta_vol11no1.jpg Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Eka Nuryanto Additional Author Edy Sigit Sutarta Additional Author Arsyad D. Koedadiri Additional Author SUGIYONO Additional Author Agus Susanto, Sudharto Ps Additional Author Heri Santoso, M. Lukman Fadli Additional Author Agus Susanto, Yasin Hartono Additional Author Edy Sigit Sutarta, Witjaksana Darmosarkoro Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2003 cover_warta_vol11no2-3.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 Konversi dan perbanyakan musuh alami, hama, penyakit, dan gulma kelapa sawit. PUSAT PENELITIAN KELAPA SAWIT Additional Author Sudharto Ps Primary Author Agus Susanto Primary Author Fahrida Yanti Primary Author mixed material Medan PPKS 2005 12583.jpg.jpg Penyakit - Penyakit Pada Kelapa Sawit = Buku 3 Penyakit - penyakit eksotis pada 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 12582.jpg.jpg Adlin U. Lubis Additional Author Iman Yani Harahap Additional Author TEGUH WAHYONO Additional Author M. Lukman Fadli Additional Author A. Sipayung Additional Author P. Purba Additional Author Rolettha Y. Purba Additional Author R. A. Lubis Additional Author Fidber Chan Additional Author Sudharto Ps Additional Author D. Ansyari Additional Author Okky S. Dharmaputra Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1993 COVER_VO._13_NO.1_FEBRUARI_1993.jpg TEGUH WAHYONO Additional Author M. Lukman Fadli Additional Author A. Sipayung Additional Author R.A. Lubis Additional Author Rolettha Y. Purba Additional Author Sudharto Ps Additional Author Suwandi Additional Author R. Desmier De Chenon Additional Author P. Simatupang Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1992 COVER_VOL.12_NO.3_OKTOBER_1992.jpg Adlin U. Lubis Additional Author A. Sipayung Additional Author Sudharto Ps Additional Author R. Desmier Additional Author D. Mariau Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1990 COVER_VOL.10_NO.2_AGUSTUS_1990.jpg Endang Syamsuddin Additional Author Sudharto Ps Additional Author Suwandi Additional Author R. Desmier De Chenon Additional Author A.U. Lubis Additional Author B. Naert Additional Author R. Gal Additional Author J. Olivin Additional Author Desmier de Chenon Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1990 COVER_VO.10_NO.1_APRIL_1990.jpg