The 100th anniversary of the publication of the mass action law by the professors C.M.Guldberg and P. Waage 1964
Now showing: Norway - Postage stamps - 1964 - The 100th anniversary of the publication of the mass action law by the professors C.M.Guldberg and P. Waage - 2 stamps.
1964
The 100th anniversary of the publication of the mass action law by the professors C.M.Guldberg and P. Waage
11. March WM: None Perforation: 13
![[The 100th anniversary of the publication of the mass action law by the professors C.M.Guldberg and P. Waage, type GK]](https://www.stampworld.com/media/catalogue/Norway/Postage-stamps/GK-s.jpg)
![[The 100th anniversary of the publication of the mass action law by the professors C.M.Guldberg and P. Waage, type GK1]](https://www.stampworld.com/media/catalogue/Norway/Postage-stamps/GK1-s.jpg)
