Quirol, B. F., Escalada , R. G. and Manatad, F. A. (1984) “INTERCROPPING SWEET POTATO WITH LEGUMES AS A CULTURAL MANAGEMENT SYSTEM”, Annals of Tropical Research, 6(1-4), pp. 20–32. Available at: https://atr.vsu.edu.ph/article/view/719 (Accessed: 5 December 2025).