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postage
1990, Jun 2 Anti-drugs Campaign issue unwmk (no perf info)
| - | 2000a | multi |
1990, Jun 2 100th Anniversary of the Carlos Pellegrini Commercial High School issue
| - | 2000a | multi |
1990, Jul 14 International Literacy Year issue
| - | 2000a | multi |
1990, Aug 11 World Basketball Championship 1990 issue
| - | 2000a | multi |
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