1. Platt, Medical Research Council, Special Report, Series No. 253 (London: H.M. Stationery Office, 1945).
2. A.O.A.C. Methods of Analysis (1945).
3. Asenjo and Frieire, de Guzman, Science, 103, 219 (1946). Mustard, Margaret J., Science, 104, 230 (1946)