“The Feasibility of Using Natural Rocks as Sources of Calcium, Magnesium and Phosphorus in Livestock Feeding in Ethiopia”, GJSFR, vol. 14, no. D3, pp. 27–31, Mar. 2014, Accessed: May 19, 2026. [Online]. Available: https://journalofscience.org/index.php/GJSFR/article/view/1150