“CHARACTERIZATION OF OIL DURING FRUIT RIPENING OF OIL PALM (Elaeis Guineensis Jacq) VARIETY D X P SIMALUNGUN”. 2017. Jurnal Penelitian Kelapa Sawit 25 (2): 59-70. https://doi.org/10.22302/iopri.jur.jpks.v25i2.25.