1. Bereskin, B. 1963. Effects of genetic ana environmental variance on dairy sire evaluation. Ph.D. thesis, Iowa State University, Ames. [Microfilm Copy no. 63-7242, University Microfilms, Ann Arbor, Michigan.]
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3. Butcher, D. F. 1965. The effect of selection on estimates of genetic parameters. Ph.D. thesis, Iowa State University, Ames. [Microfilm Copy no. 66-3859, University Microfilms, Ann Arbor, Michigan.]
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5. The estimation of repeatability and heritability from records subject to culling;Curnow;Biometrics,1961