"id","author_first1","author_last1","title","year","btitle","beditor_first","beditor_last","publisher","place","pages","author_first2","author_last2","keyword0","keyword1","type" "980","Mohamed M.","Morghem","Cultivation and chewing of khat in the Yemen Arab Republic","1983","The Health and Socio-Economic Effects of Khat Use","B.","Shahandeh","International Council on Alcohol and Addictions","Lausanne","215-18","Mohamed I.","Rufat","Marketing","Qat","chapter"