1. Observations on hatching time in three avian species;Abbott;Poultry Sci.,1960
2. A series of normal stages in the development of the chick embryo;Hamburger;J. Morphology,1951
3. Landauer, W. 1961. The hatchability of chicken eggs as influenced by environment and heredity. Monograph 1, Univ. Connecticut Agric. Exp. Sta., Storrs, Connecticut.
4. Fertility and Hatchability of Chicken and Turkey Eggs.;Taylor,1949