Number | Name | Date | Kind |
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D290423 | Peterson | Jun 1987 | |
D300687 | Kelley | Apr 1989 | |
D342374 | Wang | Dec 1993 | |
568068 | Hilgert | Sep 1896 | |
3624930 | Johnson et al. | Dec 1971 | |
4075772 | Skurella | Feb 1978 | |
4494321 | Lawlor | Jan 1985 | |
4776110 | Shiang | Oct 1988 | |
5010661 | Chu | Apr 1991 |