Guerra-M., P., Chacón, O., Lara-S., K. and Quiel, R. 2005. VITAMIN D3 EVALUATION ON ANIMAL PERFORMANCE, CARCASS TRAITS AND MEAT TENDERNESS OF BRAHMAN CATTLE AND ITS CROSSES. GUALACA, PANAMÁ. 2003. Ciencia Agropecuaria. 18 (Feb. 2005), 1-34.