The 75th Anniversary of the Death of Ludwig Boltzmann 1981
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1981
The 75th Anniversary of the Death of Ludwig Boltzmann
4. september WM: Inga storlek på arket: 50 Design: Alfred Nefe y Sepp Buchner. Perforering: 14¼ x 13¾
![[The 75th Anniversary of the Death of Ludwig Boltzmann, Typ ATV]](https://www.stampworld.com/media/catalogue/Austria/Postage-stamps/ATV-s.jpg)
