Guthrie et al., 1988. J. Anim. Sci., 66 (6): 1529-1537

Guthrie, M. J. ; Wagner, D. G., 1988. Influence of protein or grain supplementation and increasing levels of soybean meal on intake, utilization and passage rate of prairie hay in beef steers and heifers. J. Anim. Sci., 66 (6): 1529-1537