Columbia subject headings:
Harvard subject headings:
Political refugees--Afghanistan--Maps.
Political refugees--Afghanistan--Statistics.
Political refugees--European Union countries--Maps.
Political refugees--European Union countries--Statistics.
Political refugees--Iraq--Maps.
Political refugees--Iraq--Statistics.
Political refugees--Syria--Maps.
Political refugees--Syria--Statistics.
Social media--Afghanistan.
Social media--Iraq.
Social media--Syria.
Princeton subject headings:
Maps.
Political refugees--Afghanistan--Maps.
Political refugees--Afghanistan--Statistics.
Political refugees--European Union countries--Maps.
Political refugees--European Union countries--Statistics.
Political refugees--Iraq--Maps.
Political refugees--Iraq--Statistics.
Political refugees--Syria--Maps.
Political refugees--Syria--Statistics.
Social media--Afghanistan.
Social media--Iraq.
Social media--Syria.
Statistics.