Columbia subject headings:
Germany--Foreign relations--1990-
Germany--Politics and government--1990-
Peace-building--Germany.
Violence--History.
Harvard subject headings:
Europe--Foreign relations.
Europe--Politics and government.
Peace-building--Europe.
Violence--Europe--History.
Princeton subject headings:
Europe--Foreign relations.
Europe--Politics and government.
Peace-building--Europe.
Violence--Europe--History.