2 1 50 Susanto, Agus Primary Author Agus Eko Prasetyo Additional Author Sudharto Additional Author Hari Priwiratama Additional Author Tjut Ahmad P. Roziansha Additional Author G.H. FLEET Primary Author mixed material 9786027539075 Medan Pusat Penelitian Kelapa Sawit 2012 createthumb_%2815%29.jpg.jpg Purba, Rolettha Y. Primary Author Susanto, Agus Primary Author Agus Eko Prasetyo Primary Author mixed material 9789798529924 Medan Pusat Penelitian Kelapa Sawit 2010 hama_dan_penyakit_tanaman_masalah_dan_solusinya.jpg.jpg.jpg