Number | Name | Date | Kind |
---|---|---|---|
3787554 | Ziegler | Jan 1974 | |
3823220 | Donauma | Jul 1974 | |
3960549 | MacGregor | Jun 1976 |
Number | Date | Country |
---|---|---|
2,457,672 | Jun 1975 | DT |
Entry |
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Beamish, "Talanta", vol. 14, 1967, pp. 991-1009. |
Faye et al., "Analytical Chemistry", vol. 35, July, 1963, pp. 985-988. |