1. Ford, R. V., J. H. Moyer, C. Handley and C. L. Spurr: Med. Rec. Ann 51, 376 (1957).
2. Laragh, J. H., H. O. Heinemann and F. E. Demartini: J. Amer. Med. Ass. 166, 145 (1958).
3. Bayliss, R. J. S., D. Marrack, J. Pirkis, J. R. Rees and J. F. Zilva: Ann. N. Y. Acad. Sc. 7, 442 (1958).
4. Hollander, W., and R. W. Wilkins: Boston Med. Quart. 8, 69 (1957).
5. Freis, E. D., and J. M. Wilson: Med. Ann. District of Columbia 26, 468 (1957).