“Varietal Resistance of Young Clones and Seedlings of Cocoa (Theobroma Cacao L. ) to Root Infection by Phytophthora Palmivora”. Tropical Agriculture 41, no. 3 (July 30, 1964). Accessed May 25, 2024. https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/3917.