The 125th Anniversary of Union of Czech Mathematicians and Physicists 1987
Sýni: Tékkóslóvakía - Venjuleg frímerki - 1987 - The 125th Anniversary of Union of Czech Mathematicians and Physicists - 3 frímerki.
1987
The 125th Anniversary of Union of Czech Mathematicians and Physicists
6. júlí WM: Ekkert Síðu stærð: 100 Hönnun: J. Hamza Leturgröftur: vedi francobollo Götun: 11¼ x 12
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