Erdman et al., 1986. J. Dairy Sci., 69 (9): 2312-2320

Erdman, R. A. ; Proctor, G. H. ; Vandersall, J. H., 1986. Effect of rumen ammonia concentration on in situ rate and extent of digestion of feedstuffs. J. Dairy Sci., 69 (9): 2312-2320