“Intercropping maize (Zea mays L.) and upland rice (Oryza sativa L.) with common bean (Phaseolus vulgaris L.) in southern Sudan” (1997) Tropical Agriculture, 74(1). Available at: https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/2472 (Accessed: 25 April 2025).