1. Regression and Correlation Among Consecutive and Nonconsecutive Lactation Records;Barr;J. Dairy Sci.,1963
2. Reliability of Averages of Different Numbers of Lactation Records for Comparing Dairy Cows;Berry;J. Dairy Sci.,1945
3. High Records Contrasted with Unselected Records and with Average Records as a Basis for Selecting Cows;Berry;J. Dairy Sci.,1939
4. El-Shimy, S. A. F. The Heritability of Milk Yield and Fat Percentage in the Friesian Cattle in the Province of Friesland. Unpublished Ph.D. thesis, Agr. Univ. of Wageningen, Netherlands. 1956.
5. Genetic Relationship Among the First Three Lactations of Holstein Cows;Freeman;J. Dairy Sci.,1960