Columbia subject headings:
Harvard subject headings:
Germany--History--Ludwig IV, 1314-1347.
Holy Roman Empire--Kings and rulers--Biography.
Ludwig IV, Holy Roman Emperor, 1282?-1347.
Princeton subject headings:
Germany--History--Ludwig IV, 1314-1347.
Holy Roman Empire--Kings and rulers--Biography.
Ludwig IV, Holy Roman Emperor, 1282?-1347.