Evangelio, L. A. and Rosario, E. L. (1981) “EFFECT OF DIFFERENT CROPPING SYSTEMS ON THE GROWTH AND YIELD OF SWEET CORN AND SWEET POTATO”, Annals of Tropical Research, 3(4), pp. 289–300. Available at: https://atr.vsu.edu.ph/article/view/783 (Accessed: 5 December 2025).