Columbia subject headings:
Nationalism--Germany (West)--Congresses.
Police--Political activity--Germany (West)--Congresses.
Harvard subject headings:
Nationalism--Germany (West)--Congresses.
Police--Germany (West)--Political activity--Congresses.
Princeton subject headings:
Nationalism--Germany (West)--Congresses.
Police--Germany (West)--Political activity--Congresses.