Columbia subject headings:
Harvard subject headings:
Charles IV, Holy Roman Emperor, 1316-1378--Congresses.
Philosophy, Czech--History--Congresses.
Science--Czechoslovakia--History--Congresses.
Princeton subject headings:
Charles IV, Holy Roman Emperor, 1316-1378--Congresses.
Philosophy, Czech--History--Congresses.
Science--Czechoslovakia--History--Congresses.