7,329 Siti Nur Jelita Sabran 2018-11-13 http://www.tropicalgrasslands.info/public/journals/4/Historic/Tropical%20Grasslands%20Journal%20archive/PDFs/Vol_21_1987/Vol_21_04_87_pp159_168.pdf Shelton, H. M., Humphreys, L. R., & Betello, C. (1987). Pastures in the plantations of Asia and the pacific. Tropical grasslands, 21(4), 159.