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2. Comparative Fertilization Rates of Bulls with High and Low Non-return Rates;Kidder,1952
3. Advanced Statistical Methods in Biometric Research;Rao,1952
4. Snedecor, G. W. Statistical Methods. 4th ed. The Iowa State College Press, Ames.
5. Milk and Milk Products as Diluters for Bovine Semen;Thacker;J. Animal Sci.,1951