Columbia subject headings:
Harvard subject headings:
Denunciation (Criminal law)--Europe--History--Congresses.
Denunciation (Criminal law)--Germany--History--Congresses.
Denunciation (Criminal law)--Political aspects--Congresses.
Informers--Legal status, laws, etc.--Germany--History--Congresses.
Informers--Political aspects--Europe--History--Congresses.
Malicious accusation--Europe--History--Congresses.
Princeton subject headings:
Denunciation (Criminal law)--Europe--History--Congresses.
Denunciation (Criminal law)--Germany--History--Congresses.
Denunciation (Criminal law)--Political aspects--Congresses.
Informers--Legal status, laws, etc.--Germany--History--Congresses.
Informers--Political aspects--Europe--History--Congresses.
Malicious accusation--Europe--History--Congresses.