"id","author_first1","author_last1","title","year","btitle","beditor_first","beditor_last","publisher","place","pages","keyword0","keyword1","type" "835","Abdulhadi H.","al-Hamdani","The economic importance of tourism in Yemen","1985","Economy, Society and Culture in Contemporary Yemen","B.R.","Pridham","Croom Helm","London","226-39","PDRY","Tourism","chapter"