"id","author_first1","author_last1","title","year","btitle","beditor_first","beditor_last","publisher","place","pages","keyword0","type" "830","usayn Abd Allah","al-Amri","A document concerning the sale of Ghayl al-Barmaki and al-Ghayl al-Aswad by al-Mahdi Abbas, Imam of the Yemen, 1131-89/1718-75","1983","Arabian and Islamic Studies","Robin L.","Bidwell","Longman","London","29-37","Ghayl","chapter"