Nałkowski, Wacław (1851–1911)

Kautsky, Karl (1854–1938)

Dybowski, Benedykt (1833–1930)

Gall, Stanisław (1865–1942) Tauer, Antoni (1873–1910)

Høffding, Harald (1843–1931)

Stephan, Wiktor

Zaborowski, Stanisław

Jellinek, Georg (1851–1911)

Buisson, Ferdinand (1841–1932)

Jaurès, Jean (1859–1914) Lafargue, Paul (1842–1911)

Høffding, Harald (1843–1931)

Kovalevskij, Maksim Maksimovič (1851–1916)

Adamski, Józef Stanisław (1854–1926)

Michaud d'Humiac, Léon

Bogdanov, Aleksandr Aleksandrovič (1873–1928)

Lancaster, Charles. J. S. Tł.

Stephan, Wiktor (1865–1923)

Konczyński, Tadeusz (1875–1944)

Weulersse, Georges (1874-1950). Autor Lorentowicz, Jan (1868–1940) Gebethner i Wolff.

Rygier, Leon (1875–1948)

Bornik, Franciszek (1870–1906)

Łopaciński, Hieronim (1860–1906)