Number | Date | Country | Kind |
---|---|---|---|
68060 | Jul 1973 | LU |
Number | Name | Date | Kind |
---|---|---|---|
2338967 | Pollack | Jan 1944 | |
3890288 | Vogt et al. | Jun 1975 |
Number | Date | Country |
---|---|---|
2,061,584 | Jul 1972 | DT |
Entry |
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Minsk et al., J.A.C.S. 72, 2650-2654 (1950). |
Marvel et al., J.A.C.S. 62, 3495-3498 (1940). |