Columbia subject headings:
Europe--Defenses--History--20th century.
Europe--Foreign relations--1945-
North Atlantic Treaty Organization.
Poland--Politics and government--1980-1989.
Harvard subject headings:
Europe--Defenses--History--20th century.
Europe--Foreign relations--1945-
North Atlantic Treaty Organization
Poland--Politics and government--1980-1989
Princeton subject headings:
Europe--Defenses--History--20th century.
Europe--Foreign relations--1945-
North Atlantic Treaty Organization.
Poland--Politics and government--1980-1989.