Columbia subject headings:
Cologne (Germany)--Church history.
Jesuits--Germany--Cologne--History--16th century.
Jesuits--Germany--Cologne--History--17th century.
Jesuits--Germany--Cologne--History--18th century.
Harvard subject headings:
Cologne (Germany)--Church history.
Jesuits--Germany--Cologne--History--16th century.
Jesuits--Germany--Cologne--History--17th century.
Jesuits--Germany--Cologne--History--18th century.
Princeton subject headings: