Henri Frankfort, Progress of the Work of the Oriental Institute in Iraq, 1934–35. Fifth Preliminary Report of the Iraq Expedition, The Oriental Institute of the University of Chicago, Oriental Institute Communications, no. 20 (Chicago: University of Chicago, 1936), pp. 62 and 65, pls. 50–51; Pinhas Delougaz, Pottery from the Diyala Region, The Oriental Institute Publications, vol. 63 (Chicago: University of Chicago, 1952), pp. 70–72, pl. 138.