AGUSTIRA, M. A.; LUBIS, I.; LISTIA, E.; AKOEB, E. N.; HARAHAP, I. Y.; LUBIS, M. E. S. FINANCIAL AND ECONOMIC ANALYSIS OF INTERCROPPING MAIZE AND SOYBEAN ON IMMATURE OIL PALM. Jurnal Penelitian Kelapa Sawit, v. 26, n. 3, p. 141-152, 1 Dec. 2018.