1. AGATE,;; N. (1948), Lancet, 2, 530.
2. BRUUSGAARD, A. (1948), Proc. Ninth Intern. Cong. of Ind. Med., London (in the press). DENNY, J. J., ROBSON, W. D., and IRWIN, D. A. (1939), Canadian Med. Ass. Y., 40, 213.
3. DREESEN, W. C., et al. (1940), U.S.A. Public Health Bulletin, No. 250. Washington Government Printing Office.
4. FALLON, J. T. (1937), Canadian Med. Ass. J., 36, 223.
5. GARDNER, L. U. (1923), Amer. Rev. Tuberc., 7, 344.