Biochemistry Congress, Varna (Double Helix of DNA) 13 ст — Bulgaria, 1971
Biochemistry Congress, Varna (Double Helix of DNA) (Bulgaria, 1971), face value 13 ст. Photo, catalogue value, details and photo identification.
- Issue date
- 1971
- Face value
- 13 ст
- Colors
- Multicolor
- Print run
- 120,000