1. Association of Official Agricultural Chemists. Official and Tentative Methods of Analysis. 6th ed. Washington, D. C. 1945.
2. The Relationship of Feed Efficiency to Digestion Rates of Beef Cattle;Baker;J. Animal Sci.,1951
3. Yield, Chemical Composition, and Feeding Value for Milk Production of Alfalfa Hay Cut at Three Stages of Maturity;Dawson;U.S.D.A. Tech. Bull.,1940
4. Hodgson, R. E. 1951. Our Dairy Cows Could Use More Good Roughage. U.S.D.A. BDI-Inf-115.
5. Feeds and Feeding;Morrison,1950