Columbia subject headings:
Espionage, British--Turkey.
Great Britain--Foreign relations--Turkey.
Turkey--Foreign relations--Great Britain.
Harvard subject headings:
Espionage, British--Turkey.
Great Britain--Foreign relations--Turkey.
Turkey--Foreign relations--Great Britain.
Princeton subject headings:
Espionage, British--Turkey.
Great Britain--Foreign relations--Turkey.
Turkey--Foreign relations--Great Britain.