The 75th Anniversary of the Death of Ludwig Boltzmann 1981
Viser nå: Østerrike - Postfrimerker - 1981 - The 75th Anniversary of the Death of Ludwig Boltzmann - 1 frimerker.
1981
The 75th Anniversary of the Death of Ludwig Boltzmann
4. September VM: Ingen Arkstørrelse: 50 Design: Alfred Nefe y Sepp Buchner. Perforering: 14¼ x 13¾
![[The 75th Anniversary of the Death of Ludwig Boltzmann, type ATV]](https://www.stampworld.com/media/catalogue/Austria/Postage-stamps/ATV-s.jpg)
