Einstein, Albert
born 14. March 1879 in Ulm; died 18. April 1955 in Princeton, NJBrief von Albert Einstein an Hans Vaihinger, 03.05.1919 [03.05.1919]
Berlin, 03.05.1919 [03.05.1919]Brief von Albert Einstein an Hans Vaihinger, 30.06.1921 [30.06.1921]
Berlin, 30.06.1921 [30.06.1921]Brief von Max Planck an Adolf Erman
Planck, 07.06.1934Stein, Ludwig
born 12. November 1859 in Erdö-Bénye; died 13. July 1930 in SalzburgBrief von Ludwig Stein an Hans Vaihinger, 13.12.1895 [12.13.95]
Bern, 13.12.1895 [12.13.95]