Number | Date | Country | Kind |
---|---|---|---|
52/18568 | Feb 1977 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
1402442 | Porter | Jan 1922 | |
3399994 | Watkinson | Mar 1968 | |
3726823 | Morishima et al. | Apr 1973 |
Entry |
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"Chemical Principles", Second Edition, Masterton et al., p. 498, W. B. Saunders, Phila. |