The 21st Congress of the European Organization for Quality 1977
Zobrazujú sa: Bulharsko - Poštové známky - 1977 - The 21st Congress of the European Organization for Quality - 1 známky.
Zobrazujú sa: Bulharsko - Poštové známky - 1977 - The 21st Congress of the European Organization for Quality - 1 známky.
![[The 21st Congress of the European Organization for Quality, typ CNG]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/CNG-s.jpg)
