Bunnakit, K. and Khampa, S. 2011. Effect of Rumen Undegradable Protein Levels on Performance of Thai Native x Brahman Beef Cattle. Pakistan Journal of Nutrition. 10, 12 (Nov. 2011), 1163–1167. DOI:https://doi.org/10.3923/pjn.2011.1163.1167.