Yen et al., 1971. J. Anim. Sci., 33: 987-991 Document reference Yen, J. T. ; Baker, D. H. ; Harmon, B. G. ; Jensen, A. H., 1971. Corn gluten feed in swine diets and effect of pelleting on tryptophan availability to pigs and rats. J. Anim. Sci., 33: 987-991Web http://www.journalofanimalscience.org/content/33/5/987Citation key Yen et al., 1971Datasheets Corn gluten feed