1. Baer, S. H., Jr. 1963. Variations in tape weights of dairy cattle. M.S. thesis, Univ. of Wis., Madison.
2. Herd data measures of the effect of certain environmental influences on dairy cattle production;Bayley;J. Dairy Sci.,1952
3. Corley, E. L., G. R, Barr, D. A. Wieckert, E. E. Heizer, and G. E. Kraemer. 1964. Environmental influences on production in 46 dairy herds. Res. Bull. 253, Univ. of Wis., Madison.
4. Reliability of environmental data collected under field conditions;Corley;J. Dairy Sci., (Abstr.),1960
5. Reliability of score card judging of hay;Fairchild;J. Dairy Sci.,1962