Ngu N T, Nhan N T H, Hon N V, Anh L H, Thiet N and Hung L T 2019: Effects of urea, soybean meal and blood and feather meal mixture on rumen characteristics and performance of Brahman crossbred cattle. Livestock Research for Rural Development. Volume 31, Article #86. Retrieved , from http://www.lrrd.org/lrrd31/6/ntngu31086.html