Columbia subject headings:
Harvard subject headings:
Regensburg (Germany)--History--20th century.
Regensburg (Germany)--Religion--History--20th century.
World War, 1939-1945--Germany--Regensburg.
Princeton subject headings:
Regensburg Region (Germany)--History--20th century.
World War, 1939-1945--Germany--Regensburg (Region).