1. The limitation of vitamin D in the production of hatchable eggs.;Bethke;Proc. 4th World's Poul. Cong. 342-350.,1930
2. A critique of the line test for vitamin D.;Bills;Jour. Biol. Chem., 619-636.,1931
3. Results of a three years study of certain poultry rations as they affect the hatching power of hen eggs as well as the number of eggs laid.;Graham;Ont. Agric. Coll. Bul.,1931