Marston et al., 1992. Okla. State Univ. Anim. Sci. Res. Rep., MP-136: 179 Document reference Marston, T. T.; Lusby, K. S.; Wettemann, R. P., 1992. Pre- and post-calving protein or energy supplementation of spring-calving beef cows. Okla. State Univ. Anim. Sci. Res. Rep., MP-136: 179Web http://beefextension.com/research_reports/1992rr/92-28.pdfCitation key Marston et al., 1992Datasheets Soybean hulls