"id","author_first1","author_last1","title","year","publication","volume","issue","pages","keyword0","keyword1","keyword2","keyword3","keyword4","keyword5","keyword6","type" "1663","Robert B.","Serjeant","Observations on irrigation in South West Arabia","1987","Proceedings of the Seminar for Arabian Studies","18","Proceedings of the Twenty","145-53","Aramawt","Irrigation","Islamic","Law","Tihamah","Wadi Mawr","Zabid","journal"