SAXENA, P C, D P TIWARI, ANIL KUMAR, and B C MONDAL. 2011. “Effect of Dietary Supplementation of Copper and Phosphorus on Nutrient Utilizationand Growth in Crossbred Heifers”. The Indian Journal of Animal Sciences 80 (1). https://epubs.icar.org.in/index.php/IJAnS/article/view/2736.