1. Analytical methods of atomic absorption spectrophotometry;Anonymous,1971
2. Official methods of analysis,1970
3. Factors affecting percent quarters infected in a dairy herd. Master's thesis;Cassel,1978
4. Cassel, E. K., W. G. Merrill, T. V. Bui, R. A. Milligan, and R. W. Guest. 1982. Evaluation of systems for feeding supplemental concentrates to groupfed cows. Cornell Univ. Anim. Sci. Mimeo No. 59.
5. The behavioral adaptation of dairy cows to automatic feeders;Collis,1978