Columbia subject headings:
Defensive (Military science)--Research--Societies, etc.--Directories.
Europe--Research--Societies, etc.--Directories.
Security, International--Research--Societies, etc.--Directories.
Harvard subject headings:
Military research--Europe--Directories.
National security--Europe--Research--Europe--Directories.
National security--Research--Europe--Europe--Directories.
Princeton subject headings: