1. Eton, B., and Short, R. V. (1960).J. Obst. Gyn. Brit. Emp., lxvii, 5, 785.
2. Landau, R. L.et al. (1957).J. Lab. Clin. Med., 50, 613–20.
3. Landau, R. L.et al. Clin. Endocrinol. and Metabol. (in press).
4. Gornall, A. G.,et al. (1960).First Int. Congr. Endocrin. Advance Abstracts, p. 157.
5. Lipsett, Schwartz and Thorn,Mineral Metabolism—an advanced Treatise, Vol. I, Part B, Chapter 12 (Academic Press).