Number | Name | Date | Kind |
---|---|---|---|
4490127 | Matsumoto et al. | Dec 1984 | |
4605240 | Clem et al. | Aug 1986 | |
4713042 | Imhoff | Dec 1987 | |
4887990 | Bonnard et al. | Dec 1989 | |
4952196 | Chilcote et al. | Aug 1990 |
Entry |
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Zimmer, Carl "Easy Rider," Discover, Aug. 1990, p. 30. |