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3. Food of Some Well-known Birds of Forest, Farm, and Garden;Beal;U.S. Dept. Agric. Farmer's Bull. No. 506,1922
4. Seasonal variation in fatty acids of the slate-colored junco (Junco hyemalis);Bower;Physiol. Zoöl.,1968
5. Fatty acids of migrating birds;Caldwell;Comp. Biochem. Physiol.,1973