The 13th International Astronomic Union Congress, Prague 1967
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1967
The 13th International Astronomic Union Congress, Prague
21. august VM: Ingen Arkstørrelse: 10 Design: J. Lukavský Gravering: L. Jirka Perforeringer: 11¾
![[The 13th International Astronomic Union Congress, Prague, type ARW]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-stamps/ARW-s.jpg)
