1. Phosphorus requirements of laying hens;Miller;Washington Agr. Exp. Sta. Bul.,1934
2. National Research Council, 1954. Recommended nutrient allowances for domestic animals. No. 1. Nutrient requirements for poultry. Publication 301.
3. Influence of calcium and ascorbic acid on egg quality;Pepper;Poultry Sci.,1960
4. Studies on the calcium requirements of high producing White Leghorn hens;Petersen;Idaho Agr. Exp. Sta. Res. Bul.,1960
5. Pituitary and sex hormones which increase plasma calcium in birds and mammals;Riddle;Proc. Am. Phil. Soc.,1945