Columbia subject headings:
Harvard subject headings:
Utopian socialism--Philosophy--Congresses.
Utopias in literature--History--Congresses.
Utopias--History--Congresses.
Princeton subject headings:
Hermand, Jost.
Utopian socialism--Philosophy--Congresses.
Utopias in literature--History--Congresses.
Utopias--History--Congresses.