Columbia subject headings:
Bishops--Germany--Trier--History--Sources.
Church history--Middle Ages, 600-1500--Sources.
Germany--Church history--843-1517--Sources.
Trier (Germany)--Church history--Sources.
Harvard subject headings:
Bishops--Germany--Trier--History--Sources.
Church history--Middle Ages, 600-1500--Sources
Germany--Church history--843-1517--Sources.
Trier (Germany)--Church history--Sources.
Princeton subject headings:
Bishops--Germany--Trier (Regierungsbezirk)--Biography.
Catholic Church--Germany--Trier--Bishops--Biography.
Catholic Church. Archdiocese of Trier (Germany)--History--Sources.
Trier (Germany : Regierungsbezirk)--Church history--Sources.