Number | Date | Country | Kind |
---|---|---|---|
3723079 | Jul 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2951082 | Sprague et al. | Aug 1960 | |
4094900 | Anderson et al. | Jun 1978 |
Entry |
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The Condensed Chemical Dictionary, 10th Ed., Rev. by G. G. Hawley, Van Nostrand Reinhold Company, N.Y., 1981, p. 31. |