Number | Date | Country | Kind |
---|---|---|---|
8109090 | Mar 1981 | GBX | |
8120255 | Jul 1981 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
3882148 | Augstein et al. | May 1975 | |
4126625 | Yoshina et al. | Nov 1978 |
Number | Date | Country |
---|---|---|
1144906 | Mar 1969 | GBX |
Entry |
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Whitaker et al, Chemical Abstracts, vol. 83 (1975), 79066w. |