Author/Creator
Adler, Friedrich
2
Bauer, Otto
1
Belgische Werkliedenpartij (BWP)
3
CMB-fédération de Charleroi
1
Capus, Alfred
1
Destrée, Jules
2
Engels, Friedrich
1
Ernest, Victor
1
Heyman, Henri Constantin Joseph
2
Jaurès, Jean
1
Kautsky, Karl
3
Larock, Victor
1
Lassalle, Ferdinand
1
Monod, Wilfred
1
Paulsen
1
Pflüger, P.
1
Severine
2
Vandervelde, Emile
Vandervelde, Jeanne
1
Vandewalle, V.
1