[16].Henri Frankfort, Cylinder Seals: A Documentary Essay on the Art and Religion of the Ancient Near East (London, 1939).
[17].R. W. Hamilton, ‘A Sumerian cylinder seal with a handle in the Ashmolean Museum’, Iraq, vol. 29, no. 1, Spring 1967, pp.34——41.
[18].Edith Porada, ‘A leonine igure of the protoliterate period of Mesopotamia’,Journal of the American Oriental Society, vol. 70, no. 4, October——December 1950, pp.223——226.