Number | Date | Country | Kind |
---|---|---|---|
92 08984 | Jul 1992 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
3314864 | Hersch | Apr 1967 | |
3380905 | Clark | Apr 1968 | |
3923608 | Frant et al. | Dec 1975 | |
4172778 | Van de Leest, et al. | Oct 1979 |
Entry |
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Orion Research Analytical Methods Guide, 2nd. ed., Jan. 1972, p. 4. |