Stamps Year 1981

Danube Commission
Nelida Fernandez Besada
Danube Commission
Nelida Fernandez Besada
Danube Commission
Nelida Fernandez Besada
Danube Commission
Nelida Fernandez Besada
Mailbox - Postal and Philatelic Museum 1931-1981.
Herman Cudris Castañeda
Airgram, with printed seal
César Polo Gómez
Airgram With stamp Printed
César Polo Gómez
DDR
Herman Cudris Castañeda
Treasures in the DDR Libraries, Ebers papyrus.
Nemesio Ramirez Lemos
The rational application of energy, DDR.
Nemesio Ramirez Lemos