1. Effect of vitamin B12 and APF supplements on hatchability of chicken eggs;Carver;Poultry Sci.,1950
2. Vitamin B12 requirements of hens as affected by choline and antibiotic additions to the diet;Johnson;Poultry Sci.,1951
3. Built-up floor litter a source of dietary factors essential for hatchability of chicken eggs;Kennard;Poultry Sci.,1948
4. Vitamin B12 requirements for hatchability, viability and growth;Milligan;Poultry Sci.,1950
5. Vitamin B12 requirements of New Hampshires;Milligan;Poultry Sci.,1952