Columbia subject headings:
Conflict management--Europe, German-speaking.
Peace--Research--Europe, German-speaking.
Security, International--Europe, German-speaking.
Harvard subject headings:
Conflict management--Europe, German-speaking.
Peace--Research--Europe, German-speaking.
Security, International--Europe, German-speaking.
Princeton subject headings:
Conflict management--Europe, German-speaking.
Peace--Research--Europe, German-speaking.
Security, International--Europe, German-speaking.