Number | Name | Date | Kind |
---|---|---|---|
2922822 | Beach et al. | Jan 1960 | |
3037052 | Bortnick | May 1962 | |
5244926 | Harris et al. | Sep 1993 |
Number | Date | Country |
---|---|---|
1252153 | Nov 1971 | GBX |
Entry |
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Konrad Dorfner (ed.), Ion Exchangers, Walter de Gruyter & Co., Berlin--New York 1991, pp. 1002-1009. |