1. “Rickets, Osteomalacia and Tetany.”;Hess,1929
2. Influences of aged corn and supplemental vitamin A on growing finishing swine;McDonald;J. Anim. Sci.,1966
3. Mixed supplements versus soybean meal for fattening cattle self-fed ground ear corn.;Perry;Purdue Univ. Agric. Exp. Stn., Mimeo,1957
4. Levels of supplemental vitamin A with or without sun-cured alfalfa meal for fattening steer calves;Perry;J. Anim. Sci.,1962
5. “Nutrient Requirements of Beef Cattle,”;Perry,1976