Columbia subject headings:
Syria--History--Civil War, 2011-
Syria--History--Civil War, 2011---Participation, Kurdish.
Syria--History--Civil War, 2011---Participation, Turkish.
Harvard subject headings:
Syria--History--Civil War, 2011-
Princeton subject headings:
Syria--History--Civil War, 2011-
Syria--History--Civil War, 2011---Participation, Kurdish.
Syria--History--Civil War, 2011---Participation, Turkish.