Varma, Arun, and P. C. Sawhney. 1969. “Influence of Sulphur Supplementation on the Nutrient Utilization in Goats on Rations Containing Urea”. The Indian Journal of Nutrition and Dietetics 6 (4):301-4. https://www.informaticsjournals.com/index.php/ijnd/article/view/14244.