1. Heritability of albumen height and specific gravity from White Leghorns and Barred Rocks and the correlations of these traits with egg production;Johnson;Poultry Sci.,1955
2. Extra chromosomal effects on the transmission of egg shell quality in chickens;McClary;Records Genet. Soc. Amer.,1950
3. The relation of specific gravity to hatching power in eggs of the domestic fowl;Munro;Sci. Agri.,1940
4. Influence of specific gravity of hens’ eggs on fertility, hatching power and growth of chicks;Mussehl;J. Agri. Res.,1923
5. A comparison of certain methods of estimating shell strength;Novikoff;Poultry Sci.,1949