1. Wahba, M., J. Phys. Coll. Chem., 52, 1197 (1948).
2. Koch, W., Forsch. Gebiete, Ingenieurw., 5, 138 (1934); Z. Ver. deut. Ing., 78, 1110 (1934). Cited from Dorsey, “Properties of Ordinary Water Substance”, 259 (A.C.S. Monograph, Series No. 81, 1940).