Columbia subject headings:
Balkan Peninsula--Defenses--Congresses.
Balkan Peninsula--Military policy--Congresses.
Balkan Peninsula--Politics and government--1989---Congresses.
Balkan Peninsula--Politics and government--Congresses.
Europe--Politics and government--1989---Congresses.
Harvard subject headings:
Arms control--Balkan Peninsula--Congresses.
Balkan Peninsula--Politics and government--1989---Congresses.
Europe--Politics and government--1989---Congresses.
National security--Balkan Peninsula--Congresses.
Princeton subject headings:
Arms control--Balkan Peninsula--Congresses.
Balkan Peninsula--Politics and government--1989---Congresses.
National security--Balkan Peninsula--Congresses.