Number | Date | Country | Kind |
---|---|---|---|
22477/77 | May 1977 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
3577420 | Hess et al. | May 1971 | |
3632763 | Hess et al. | Jan 1972 | |
4007187 | Fauran et al. | Feb 1977 |
Entry |
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Hess et al., "Chemical Abstracts," vol. 72, 1970, col. 31834r. |
Marquet et al., "Chemical Abstracts," vol. 72, 1970, col. 78968c. |