Columbia subject headings:
Harvard subject headings:
Braunschweig Region (Germany)--Biography.
Burg Warberg (Braunwchweig Region, Germany)--History.
Nobility--Germany--Braunschweig (State)--Biography
Warberg Family.
Princeton subject headings:
Nobility--Germany--Braunschweig (State)--History.
Nobility--Germany--Warberg--History.