Sources:
http://www.migrationpolicy.org/article/north-korea-understanding-migration-and-closed-country
http://www.doctorswithoutborders.org/news-stories/speechopen-letter/north-korea-humanitarian-situation-and-refugees
https://www.nknews.org/2015/04/un-report-details-ongoing-humanitarian-issues-in-north-korea/
http://www.heritage.org/index/country/northkorea
https://en.wikipedia.org/wiki/North_Korean_famine
https://en.wikipedia.org/wiki/Workers%27_Party_of_Korea
http://www.doctorswithoutborders.org/news-stories/speechopen-letter/north-korea-humanitarian-situation-and-refugees
https://www.nknews.org/2015/04/un-report-details-ongoing-humanitarian-issues-in-north-korea/
http://www.heritage.org/index/country/northkorea
https://en.wikipedia.org/wiki/North_Korean_famine
https://en.wikipedia.org/wiki/Workers%27_Party_of_Korea