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postage
1991, Aug 24 Pre-Columbian Art issue unwmk p. 12
| - | 210p | multi |
airmail
1992, Feb 8 8th U.N. Conference on Trade and Development Session issue (no perf info)
| - | 210p | multi |
1992, Mar 11 Exports 1992 issue p. 12
| - | 210p | multi |
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