1. Bronkhorst, J. J. 1933. A physical, chemical and physiological study of high and low hatching lines of single comb White Leghorns. Ph.D. Thesis Cornell University (Ithaca, N. Y.) as cited by Walter Landauer, 1948. The hatchability of chicken eggs as influenced by environment and heredity. Bulletin 262 Storrs Agr. Exp. Sta., Storrs, Connecticut.
2. Macro-and microscopic methods of detecting fertility in unincubated hen's eggs;Kosin;Poultry Sci.,1944
3. The accuracy of the macroscopic method in identifying fertile unincubated germ disks;Kosin;Poultry Sci.,1945
4. Growing embryos in plastic shells;Quisenberry;Poultry Sci.,1962
5. Cultivation of the early chick embryo in vitro;Romanoff;Anat. Rec.,1943