References
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- Reed, R. F. and Dorrts, P. W. L.T.F. Research Bulletin No. 6 New York. 1945.
- Jorgensen, G, W. and Bruno, M. H. L.T.F. Research Bulletin No. 218, New York. 1954.
- Watter, O. Die Lichtgerbuna in Theorie und Praxis, W. Knapp Halle. 1951.
- Forst and Galaszin. Zurn. fiz Chim., 28, p. 1668. 1954.