1. Hatchability of purebred and crossbred chick embryos;Henderson;Michigan Agr. Expt. Sta. Quart. Bull.,1951
2. Hatching power of purebred vs. crossbred chick embryos;Henderson;Michigan Agr. Expt. Sta. Quart. Bull.,1957
3. The statistical treatment of hatchability data;Hendricks;Poultry Sci.,1935