Columbia subject headings:
Syria--Foreign relations--Turkey--21st century.
Syria--History--Civil War, 2011-
Syria--Politics and government--2000-
Syria--Politics and government--20th century.
Turkey--Foreign relations--Syria--21st century.
Harvard subject headings:
Kurds--Syria.
Partiya Karkerên Kurdistanê.
Partiya Yekîtî ya Demokrat a Kurd li Sûriyê.
People's Protection Units (Organization)
Syria--Foreign relations--Turkey--21st century.
Syria--History--Civil War, 2011-
Syria--Politics and government--2000-
Syria--Politics and government--20th century.
Turkey--Foreign relations--21st century.
Turkey--Foreign relations--Syria--21st century.
Princeton subject headings:
Syria--Foreign relations--Turkey--21st century.
Syria--History--Civil War, 2011-
Syria--Politics and government--2000-
Syria--Politics and government--20th century.
Turkey--Foreign relations--21st century.