Columbia subject headings:
Conflict (Psychology)--Encyclopedias.
Peace--Encyclopedias.
Social conflict--Encyclopedias.
Violence--Encyclopedias.
Harvard subject headings:
Conflict (Psychology)--Encyclopedias.
Peace--Encyclopedias.
Reference works.
Social conflict--Encyclopedias.
Violence--Encyclopedias.
Princeton subject headings:
Conflict (Psychology)--Encyclopedias.
Encyclopedias.
Peace--Encyclopedias.
Social conflict--Encyclopedias.
Violence--Encyclopedias.