Williams, 1897. USDA, Farmers' Bulletin N° 58 Document reference Williams, T. A., 1897. The soy bean as a forage crop. USDA, Farmers' Bulletin N° 58Web https://ia902501.us.archive.org/32/items/CAT31127330/farmbul0058rev1899.pdfCitation key Williams, 1897Datasheets Soybean forage
