J F Webster and B Viswanath, Report on the Soil Survey of the Diahlah Area-Right Bank (Dept of Agriculture, Mesopotamia, memoir No 2) Dated as: Bombay, 1921
V H W Dowson, Dates & Date Cultivation of the Iraq, Parts I and II (Agricultural Directorate, Ministry of Interior, Mesopotamia, memoir III) Dated as: Cambridge, 1921