Columbia subject headings:
Harvard subject headings:
Lebanon--Boundaries--Palestine--History.
Lebanon--Boundaries--Syria--History.
Palestine--Boundaries--Lebanon--History.
Palestine--Boundaries--Syria--History.
Syria--Boundaries--Lebanon--History.
Syria--Boundaries--Palestine--History.
Princeton subject headings:
Lebanon--Boundaries--Palestine--History.
Lebanon--Boundaries--Syria--History.
Palestine--Boundaries--Lebanon--History.
Palestine--Boundaries--Syria--History.
Syria--Boundaries--Lebanon--History.
Syria--Boundaries--Palestine--History.