Philosoph und Mathematiker (1859-1938). Autograph postcard signed. Freiburg im Breisgau. 15.01.1926. 1 S. Qu.-8vo. Mit eh. Adresse verso.
$ 2,964 / 2.500 €
(62279/BN45461)
To the German philosopher Eberhard Zwirner (1899-1984, later a well renowned phonetician), thanking for sending him an essay.