Number | Date | Country | Kind |
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57-104814 | Jun 1982 | JPX |
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4016290 | Rahman | Apr 1977 | |
4302459 | Steck et al. | Nov 1981 | |
4311712 | Evans et al. | Jan 1982 |
Entry |
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Borovan-Chem. Abst.-vol. 95 (1981), p. 91,291w. |
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