1. Vitamin D potency of human breast milk;Harris;Am J Public Health,1939
2. Vitamins in milk and milk products;Hartmann,1965
3. The total content of vitamin D in human milk and cow's milk;Leerbeck;Br J Nutr,1980
4. Pediatrics;Rudolph,1979
5. Vitamin and mineral supplement needs in normal children in the United States;American Academy of Pediatrics Committee on Nutrition;Pediatrics,1980