Number | Date | Country | Kind |
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2329553 | Jun 1973 | DT | |
2407160 | Feb 1974 | DT |
Entry |
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pearson, D. E. et al., Journal American Chemical Society, vol. 73 (1951), p. 864 relied on. |
Campbell et al., Australia Journal of Chemistry, vol. 23 (1970) pp. 203 and 204. |