Number | Date | Country | Kind |
---|---|---|---|
8038634 | Dec 1980 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
3986931 | Bernt et al. | Oct 1976 | |
4336331 | Nagasawa et al. | Jun 1982 |
Number | Date | Country |
---|---|---|
55-99198 | Jul 1980 | JPX |
Entry |
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Hammond et al., The Lancet, 1(8216), 391-392 (1981). |