"id","author_first1","author_last1","title","year","btitle","publisher","place","pages","keyword0","keyword1","keyword2","keyword3","keyword4","keyword5","type" "1794","Fred","Halliday","North Yemen (Part II) and South Yemen (Part III)","1975","Arabia Without Sultans: A Political Survey of Instability in the Third World","Vintage Press","New York","79-262","1962","Aden","National Liberation Front","South Yemen","YAR","YAR-Saudi Arabia","chapter"