The 7th Congress of the Federation of the Societies of Biochemistry and Molecular Biology (FEBS) 1971
Now showing: Bulgaria - Postage stamps - 1971 - The 7th Congress of the Federation of the Societies of Biochemistry and Molecular Biology (FEBS) - 1 stamps.
1971
The 7th Congress of the Federation of the Societies of Biochemistry and Molecular Biology (FEBS)
20. September WM: None Perforation: 12½
![[The 7th Congress of the Federation of the Societies of Biochemistry and Molecular Biology (FEBS), type BUO]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/BUO-s.jpg)
