Number | Date | Country | Kind |
---|---|---|---|
8317595 | Jun 1983 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
4136173 | Pramoda et al. | Jan 1979 |
Number | Date | Country |
---|---|---|
1108376 | Apr 1968 | GBX |
1531987 | Nov 1978 | GBX |
Entry |
---|
Chemical Abstracts, vol. 93 (1980) 44637n, vol. 96 (1982) 33848t. |