Columbia subject headings:
Bishops--Germany--Regensburg--History--Sources.
Catholic Church. Diocese of Regensburg (Germany)--History--Sources.
Regensburg (Germany)--Church history--Sources.
Harvard subject headings:
Bishops--Germany--Regensburg--Biography.
Catholic Church. Diocese of Regensburg (Germany)--History--Sources.
Regensburg (Germany)--Church history--Sources.
Princeton subject headings:
Bishops--Germany--Regensburg--Biography.
Catholic Church. Diocese of Regensburg (Germany)--History--Sources.
Regensburg (Germany)--Church history--Sources.