Columbia subject headings:
Harvard subject headings:
Orders of knighthood and chivalry--Germany--History.
Teutonic Knights--History.
Westphalians--Livonia.
Westphalians--Mark (Grafschaft)
Princeton subject headings:
Livonia--Biography.
Mark (Grafschaft)--Biography.
Order of the Brothers of the Sword--History.
Orders of knighthood and chivalry--Germany--History.
Teutonic Knights--History.
Westphalians--Germany--Mark (Grafschaft)--Biography.
Westphalians--Livonia--Biography.