Mariscal, Algerico M., and Azucena L. Carpena. “GENETIC VARIATION IN A WIDE GENE BASE POPULATION OF SWEET POTATO [Ipomoea Batatas (L) Lam]”. Annals of Tropical Research, vol. 10, no. 2, Sept. 1988, pp. 74-84, https://atr.vsu.edu.ph/article/view/642.