1. Aulerich, C. A. 1965. Differences in extending terminal and nonterminal incomplete lactations to 305 days. M. S. Thesis. Michigan State University Library, East Lansing, Michigan.
2. Percentage of sire's daughters having a second, fourth, and sixth lactation;Carter;J. Dairy Sci.,1968
3. Components of the relationship between level of production and the rate of maturity in dairy cattle;Hickman;J. Dairy Sci.,1955
4. Progeny testing methods in Europe;Johansson;J. Dairy Sci.,1960
5. Kendriek, J. F. 1955. Standardizing Dairy-Herd-Improvement-Association records in proving sires. AES-52-1.