Columbia subject headings:
Christian literature, German--Germany--Cologne.
Cologne (Germany)--Church history.
Cologne (Germany)--History.
Printing--Germany--Cologne--History.
Harvard subject headings:
Christian literature, German--Germany--Cologne.
Cologne (Germany)--Church history.
Cologne (Germany)--History.
Printing--Germany--Cologne--History.
Princeton subject headings:
Christian literature, German--Germany--Cologne.
Cologne (Germany)--Church history.
Cologne (Germany)--History.
Printing--Germany--Cologne--History.