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2. Variability of shell porosity in the hen’s egg;Almquist;Hilgardia,,1931
3. Asmundson, V. S., 1933. The relation of the secretory activity of different parts of the hen’s oviduct to the inheritance of weight of egg. Proc. 5th World’s Poultry Congress, Rome, pp. 1-5
4. Some factors affecting the weight, composition and hatchability of hen eggs;Atwood;West Virginia Agric. Exp. Stat. Bull.,1914
5. Temperature and its effect on egg size in the domestic fowl;Bennion;Poultry Sci.,1933