1. Will dairying be better in the years ahead?;Davulis;Hoard's Dairyman,1974
2. Goering, H. K., and P. J. Van Soest. 1970. Forage fiber analyses. U. S. Dep. Agr., Agr. Handbook No. 379.
3. Practical physiological chemistry;Hawk,1949
4. An experimental self-feeding horizontal silo;Hentges;FL Agr. Exp. Circ. S.,1958
5. How fast should dairy heifers grow?;Lamb;Hoard's Dairyman,1969