“THE EFFECT OF WEANING AGE ON THE POST-WEANING PERFORMANCE OF ARTIFICIALLY REARED CROSS-BRED ( KENANA X FRIESIAN )CALVES IN THE GEZIRA”. The Sudan Journal Of Animal Production المجلة السودانية للانتاج الحيواني 1, no. 1 (January 15, 1988): 17–23. Accessed October 19, 2026. https://sud-jap.sd/Journal/index.php/sjap/article/view/19.