Stamps, UNESCO issue
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- Andorra (Sp), 1997
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- Portugal
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- China, ROC, 1962
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- Czechoslovakia, 1963
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- Guatemala, airmail, 1960
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- Laos, 1958
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- Nepal, 1963
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- United Nations, 1955
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- South Vietnam, 1958
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1 to 28 of 28