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D186905 | Wilfert | Dec 1959 | |
D272826 | Cochran et al. | Feb 1984 | |
D314389 | Lynnes et al. | Feb 1991 | |
D322792 | Park | Dec 1991 | |
D376372 | Little et al. | Dec 1996 | |
D391378 | Bannister | Feb 1998 | |
4055262 | Bauer et al. | Oct 1977 | |
4815550 | Mather et al. | Mar 1989 | |
5029918 | Albright et al. | Jul 1991 | |
5511932 | Todd et al. | Apr 1996 | |
5542814 | Ashcroft et al. | Aug 1996 | |
5609464 | Moffitt et al. | Mar 1997 |