Columbia subject headings:
Harvard subject headings:
Arab Spring, 2010---Congresses.
Christianity and other religions--Islam--Congresses
Christians--Middle East--Congresses.
Islam--Relations--Christianity--Congresses
Middle East--Church history--Congresses.
Princeton subject headings:
Arab Spring, 2010---Congresses.
Christians--Middle East--Congresses.
Middle East--Church history--Congresses.