Ed: 1924 - XV Colloquium Spectroscopicum Internationalle- Madrid 1966
Caution
This fully reproduced in this stamp in other electronic or printed without the express permission of the owner.
If you are interested contact the owner Stamp: Herman Cudris Castañeda
Descripción / observaciones
Códigos: Michel:ES 1812 - Stamp Number:ES 1570 - Yvert et tellier:ES 1581 - Stanley Gibbons:ES 1982
