Colnect-4136-531-20th-International-Congress-of-Pure-and-Applied-Chemistry.jpg
Source: Colnect
Issued by: Russia
Function: postage
Date: 6/15/1965
Issue: IUPAC Congress
Denom: 4k
Color: multicolored
Design:
Watermark: unwmk
Perf: 12
Catalog value:

In collections: used (Stan Shebs)

External links:
Colnect 88332-..iet_Union_USSR