International Year of Chemistry 2011
Tani duke shfaqur: Zvicrra - Pulla Poste - 2011 - International Year of Chemistry - 1 pulla.
2011
International Year of Chemistry
3. Mars WM: Asnje Madhesia e Faqes : 20 Dizajni: Daniel Dreier. Gravure : Cartor Security Printing.
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