1. Variation and heredity of some characters in White Leghorns, Rhode Island Reds, and Barnevelders;Axelsson,1932
2. A study of selection for size, shape and color of hens' eggs;Benjamin,1920
3. Egg shell color in crosses between white- and brown-egg breeds;Hall;Poultry Sci.,1944
4. Inheritance of egg size and egg character;Hays;Mass. Agr. Exp. Sta. Bull.,1937
5. Heritability of type in Poland China swine as evaluated by scoring;Hetzer;J. Animal Sci.,1944