Engels, Friedrich (1820–1895) Marx, Karl (1818–1883)
Kołłątaj, Hugo (1750–1812) Skrzypek, Marian
Twardowski, Kazimierz (1866–1938)
Twardowski, Kazimierz (1866–1938)
Twardowski, Kazimierz (1866–1938)
Twardowski, Kazimierz (1866–1938)
Twardowski, Kazimierz (1866–1938)
Twardowski, Kazimierz (1866–1938)
Twardowski, Kazimierz (1866–1938)
Twardowski, Kazimierz (1866–1938)
Twardowski, Kazimierz (1866–1938)
Engels, Friedrich (1820–1895)
Krzywicki, Ludwik (1859–1941)
Kramsztyk, Feliks (1854–1918)