Columbia subject headings:
Archives--Austria--Catalogs.
Catholic Church--History--Sources.
Holy Roman Empire--History--To 1517--Sources.
Harvard subject headings:
Archives--Austria--Catalogs.
Austria--Church history--Sources--Bibliography--Catalogs.
Catholic Church--Austria--History--Sources--Bibliography--Catalogs.
Catholic Church--History--Sources.
Holy Roman Empire--History--To 1517--Sources--Biography--Catalogs.
Holy Roman Empire--History--To 1517--Sources.
Papal documents--Bibliography--Catalogs.
Princeton subject headings:
Archives--Austria--Catalogs.
Catholic Church--History--Sources.
Holy Roman Empire--History--To 1517--Sources.