1. Bethea, O. W.,—Year Book of General Therapeutics, Year Book Publishers, Chicago, pp. 130–132, 1948.
2. Bradly,—Lancet,1: 869, 1949.
3. Burkenholder,—Science, 106, 417, 1947.
4. Das, A., andBanerjee, D.,—Cal. Med. J.,46: 213, 1949.
5. Douglus, A. D. M.,—Lancet,1: 353, 1950.