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3. Edwards, H. M., Jr., 1963. The current status of essential fatty acid requirement of poultry. Proc. Cornell Nutr. Conf. for Feed Manufacturers, p. 93-100.
4. Harvey, W. R., 1960. Least-squares analysis of data with unequal numbers. USDA, ARS 20-28.
5. Essential fatty acid deficiency in the laying hen;Jensen;Poultry Sci.,1963