Columbia subject headings:
Harvard subject headings:
Middle East--Foreign relations--Russia (Federation)--21st century.
Russia (Federation)--Foreign relations--Middle East--21st century.
Russia (Federation)--Foreign relations--Syria--21st century.
Syria--Foreign relations--Russia (Federation)--21st century.
Syria--History--Civil War, 2011-
Princeton subject headings:
Middle East--Foreign relations--Russia (Federation).
Russia (Federation)--Relations--Middle East.
Syria--History--Civil War, 2011-