[1]
Ruiz, T.M. and Cancel-Medina, E. 2006. Performance of Holstein cows fed two levels of concentrate supplementation and ruminally undegraded protein. The Journal of Agriculture of the University of Puerto Rico. 90, 1-2 (Jan. 2006), 9-26. DOI:https://doi.org/10.46429/jaupr.v90i1-2.2958.