Columbia subject headings:
Germany--History--Franconian House, 1024-1125.
Germany--History--Hohenstaufen, 1138-1254.
Harvard subject headings:
Germany--History--843-1273.
Germany--History--Franconian House, 1024-1125.
Germany--History--Hohenstaufen, 1138-1254.
Princeton subject headings:
Germany--History--Franconian House, 1024-1125.
Germany--History--Hohenstaufen, 1138-1254.
Germany--History--Lothair II, 1125-1137.