Columbia subject headings:
Harvard subject headings:
Germany--History--843-1273.
Germany--History--Henry IV, 1056-1106.
Henry IV, Holy Roman Emperor, 1050-1106.
Holy Roman Empire--History--Henry IV, 1056-1106.
Holy Roman Empire--Kings and rulers--Biography.
Wiprecht, von Groitzsch, 1050?-1124.
Princeton subject headings:
Germany--History--843-1273.
Germany--History--Henry IV, 1056-1106.
Henry IV, Holy Roman Emperor, 1050-1106.
Holy Roman Empire--History--Henry IV, 1056-1106.
Holy Roman Empire--Kings and rulers--Biography.
Wiprecht, von Groitzsch, 1050?-1124.