Columbia subject headings:
Harvard subject headings:
Feudalism--Germany--Sources.
Land tenure--Germany--Bortfeld--History--Sources.
Land tenure--Germany--Hahnensee--History--Sources.
Princeton subject headings:
Bortfeld family.
Catholic Church. Diocese of Hildesheim (Germany)--History--Sources.
Feudalism--Germany (West)--Hildesheim (Landkreis)--History--Sources.
Hahnensee family.
Hildesheim (Germany : Landkreis)--History--Sources.