Columbia subject headings:
Kiel (Germany)--Description and travel--Congresses.
Kiel (Germany)--History--Congresses.
Harvard subject headings:
Kiel (Germany)--Description and travel--Congresses.
Kiel (Germany)--History--Congresses.
Princeton subject headings:
Kiel (Germany)--Description--Congresses.
Kiel (Germany)--History--Congresses.