1. Comparisons of Methods of Estimating Milk and Fat Production in Dairy Cows;Alexander;J. Dairy Sci.,1949
2. The Accuracy of Various Methods of Estimating a Dairy Cow's Production of Milk and Butterfat;Campbell;Proc. Ann. Conf. New Zealand Soc. Anim. Prod.,PP,1946
3. Monthly and Bimonthly Tests;Copeland;Jersey Bull. and Dairy World,1928
4. Reliability of Bimonthly Tests;Gifford;J. Dairy Sci.,1930
5. Estudo sôbre a Periodicidade do Controle Quantitativo du Producão Leiteira;Jordao;Bol. Ind. Animal,1947