Letourneau, Charles Jean Marie (1831–1902)
Rubczyński, Witold (1864–1938)
Sheldon, Walter Lorenzo (1858–1907)
Giżycki, Georg von (1851–1895)
Kurnatowski, Jerzy (1874–1934)
Myślicki, Ignacy (1874–1935)
Biegański, Władysław (1857–1917)
Høffding, Harald (1843–1931)
Świętochowski, Aleksander (1849–1938)
Lubelski, Józef (1884–1943)
Lewicka-Strzałecka, Anna
Cathrein, Victor (1845–1931)
Bureau, Paul (1865–1923)
Pawlicki, Stefan Zachariasz (1839–1916)
Kropotkin, Petr Alekseevič (1842–1921)
Naudet, Paul (1859–1929)
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