Columbia subject headings:
Europe--Defenses.
North Atlantic Treaty Organization--Armed Forces.
Warsaw Treaty Organization--Armed Forces.
World War III.
Harvard subject headings:
Europe--Defenses.
North Atlantic Treaty Organization--Armed Forces.
Warsaw Treaty Organization--Armed Forces.
World War III.
Princeton subject headings:
Europe--Defenses.
North Atlantic Treaty Organization--Armed Forces.
Warsaw Treaty Organization--Armed Forces.
World War III.