"id","author_first1","author_last1","title","year","publication","volume","issue","pages","keyword0","keyword1","keyword2","type" "1450","Ingrid","Hehmeyer","Irrigation farming in the ancient oasis of Marib","1989","Proceedings of the Seminar for Arabian Studies","19","Proceedings of the Twenty","33-44","Crops","Irrigation","Marib","journal"