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| 1 | Legrain, L., The Culture of the Babylonians from their Seals in the Collection of the Museum, Publications of the Babylonian Section 14, Philadelphia 1925 |
| 2 | Hattori, A., Texts and Impressions: a Holistic Approach to Ur III Cuneiform Tablets from the University of Pennsylvania Expeditions to Nippur, Ph.D. Diss, University of Pennsylvania 2002 |
| http://cdli.earth/P269172 |
| http://www.penn.museum/collections/object.php?irn=526083 |
| http://oracc.museum.upenn.edu/epsd2/P269172 |
| http://www.ebl.lmu.de/library/CBS.14201 |