1. Beardsley, J. R. 1950. A Report of a Study of Age Conversion Factors to the Research Committee of the American Jersey Cattle Club. Mimeograph.
2. Experimental Designs;Cochran,1957
3. Estimation of Changes in Herd Environment;Henderson;J. Dairy Sci.,1949
4. Estimates of Environmental Trends and Biases Resulting from Errors in Age Factors and Repeatability;Henderson;J. Dairy Sci.,1958
5. The Estimation of Environmental and Genetic Trends from Records Subject to Culling;Henderson;Biometrics,1959