Number | Date | Country | Kind |
---|---|---|---|
2314207 | Mar 1973 | DE |
Number | Name | Date | Kind |
---|---|---|---|
3702219 | Braun et al. | Nov 1972 | |
3778156 | Schmedes et al. | Dec 1973 | |
3979162 | George | Sep 1976 |
Number | Date | Country |
---|---|---|
1,117,776 | Jun 1968 | GB |
Entry |
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Massman, Spectrochimica Acta, vol. 23B, No. 4, Apr. 1968, pp. 215-226. |
Morrison et al., Analytical Chemistry, vol. 42, No. 7, Jun. 1970, pp. 809-811. |