International Physics Olympiad - Yogya, Indonesia 2017
Prezentat acum: Slovacia - Timbre poştale - 2017 - International Physics Olympiad - Yogya, Indonesia - 1 timbre.
2017
International Physics Olympiad - Yogya, Indonesia
10. Februarie WM: Niciunul Marimea foii: 50 Design: Zdenek Netopil Perforare: 11½
![[International Physics Olympiad - Yogya, Indonesia, Tip AAE]](https://www.stampworld.com/media/catalogue/Slovakia/Postage-stamps/AAE-s.jpg)
