Portugal issued the following stamp on 2019 International Year of Periodic Table (IYPT) Stamp:
Postage Stamps issued on the same theme "International Year of Periodic Table - 2019" by other countries can be seen by clicking the link.
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| Portugal 2019 IYPT Stamp Set |
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| Portugal 2019 IYPT Stamp Souvenir Sheet |
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| Portugal 2019 IYPT FDC with Stamp Set |
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| Portugal 2019 IYPT FDC with Souvenir Sheet |
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