Ullah, M., Islam, K., Akbar, M., Khaleduzzaman, A. and Debi, M. (2012) “Effect Of Levels And Sources Of Protein On The Performance And Nutrient Digestibility In Black Bengal Goat”, Bangladesh Journal of Animal Science, 38(1-2), pp. 53–60. doi: 10.3329/bjas.v38i1-2.9912.