Gmelin Handbook: Na: SVol.1, 69, page 294 - 295 Full Text Show Details Il'inskii, V. P. C. A., Sborn. statei k dvadtsatiletiyu gos. Inst. prikl. Khim. 1919/39, Leningrad 1939, S. 48/55 1952 , p. 2094