The 13th Congress of the Communistic Dimitrov-Youth-Association, Sofia 1977
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1977
The 13th Congress of the Communistic Dimitrov-Youth-Association, Sofia
9. May WM: Tiada Perforasi: 13
![[The 13th Congress of the Communistic Dimitrov-Youth-Association, Sofia, jenis CNI]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/CNI-s.jpg)
