Columbia subject headings:
Smuggling--Syria.
Smuggling--Turkey.
Turkey--Boundaries--Syria.
Turkey--Foreign relations--Syria.
Harvard subject headings:
Smuggling--Syria.
Smuggling--Turkey.
Syria--Foreign relations--Turkey.
Turkey--Boundaries--Syria.
Turkey--Foreign relations--Syria.
Princeton subject headings:
Smuggling--Syria.
Smuggling--Turkey.
Syria--Foreign relations--Turkey.
Turkey--Boundaries--Syria.
Turkey--Foreign relations--Syria.