Columbia subject headings:
Harvard subject headings:
Communism--History--Exhibitions.
Labor movement--Germany--History--19th century--Exhibitions.
Marx, Karl, 1818-1883--Anniversaries, etc.--Exhibitions.
Marx, Karl, 1818-1883--Exhibitions.
Princeton subject headings:
Communism--History--Exhibitions.
Labor movement--Germany--History--19th century--Exhibitions.
Marx, Karl, 1818-1883--Anniversaries, etc.--Exhibitions.
Marx, Karl, 1818-1883--Exhibitions.