Congress of the International Union of Students 1964
Sýni: Búlgaría - Venjuleg frímerki - 1964 - Congress of the International Union of Students - 1 frímerki.
Sýni: Búlgaría - Venjuleg frímerki - 1964 - Congress of the International Union of Students - 1 frímerki.
![[Congress of the International Union of Students, tegund AXA]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/AXA-s.jpg)
