Author/Creator
Kautsky, Karl
2
Van Gelder, C.
2
Bellamy, Edward
1
Blatchford, Robert
1
Bolkestein, H.
1
Cunow, Heinrich
1
De Laveleye, Emile
1
Domela Nieuwenhuis, Ferdinand
1
El-Ghusein, Fâ'iz
1
George, Henry
1
Heijenbrock, H.
1
Jelgersma, J.T.
1
Kleijn, L.J.
1
Kropotkin, Peter
1
Kutter, Hermann
1
Lammers, C.
1
Machiavelli, N.
1
Mill, John Stuart
1
Morris, William
1
Noest, Elizabeth M.
1
Tinbergen, Jan
1
Van Houten, S.
1
Von Schmid, J.J.
1
Wilbrandt, Robert
1