1. Effect of nutrition on variability in the growth of chickens;Hammond;Poultry Sei.,1942
2. Sex dimorphism and variability in the appendicular skeleton of the Leghorn fowl;Hütt;Poultry Sei.,1929
3. Breeding for body shape in chickens;Jaap;U. S. Egg and Poul. Mag.,1938
4. Improving market poultry;Jaap;How the geneticist approaches the problem. U. S. Egg and Poul. Mag.,1940
5. Criteria of conformation in market poultry;Jaap;Poultry Sei.,1938