Columbia subject headings:
Humanism--History--20th century.
Marx, Karl, 1818-1883.
Praxis; filozofski časopis. Jugoslavensko izdanje.
Socialism.
Harvard subject headings:
Humanism--History--20th century.
Marx, Karl, 1818-1883
Praxis. Jugoslavensko izdanje.
Socialism.
Princeton subject headings:
Humanism--History--20th century.
Marx, Karl, 1818-1883.
Praxis. Jugoslavensko izdanje.
Socialism.