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All conferences about Sciences
| Conference | Date | Deadline | Country |
|---|---|---|---|
| 2001-02-03 | 2001-02-03 | Canada | |
| 1989-03-28 | 1988-10-30 | U.S.A | |
| 1980-08-18 | 1980-01-30 | U.S.A | |
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