1. Effects of phosphorus supplements on cattle grazing on range deficient in this mineral;Black;USDA Tech. Bull.,1943
2. Bonewitz, R., E. P. Call, and J. R. Dunham. Kansas Dairy Herd Improvement Association Annual Summaries. 1966–67, 1967–68, 1968–69, 1969–70, 1970–71. Extension Dairy Science, Manhattan.
3. Relationship between level of milk production and breeding efficiency in dairy cattle;Boyd;J. Animal Sci.,1954
4. The effects of feeding different levels of di-calcium phosphate to heifers on bluestem pasture;Drake;Kansas Agr. Exp. Sta. Bull.,1964
5. A mineral deficiency in the rations of cattle;Eckles;Minnesota Agr. Exp. Sta. Bull.,1926