Columbia subject headings:
Combined operations (Military science)
North Atlantic Treaty Organization--Armed Forces--Reorganization.
North Atlantic Treaty Organization--Membership.
Harvard subject headings:
Combined operations (Military science)
North Atlantic Treaty Organization--Armed Forces--Reorganization.
North Atlantic Treaty Organization--Membership.
Princeton subject headings:
Combined operations (Military science)
North Atlantic Treaty Organization--Armed Forces--Reorganization.
North Atlantic Treaty Organization--Membership.