| Bibliography |  Suggestions |
| 1 | Sigrist, M. - Owen, D.I. - Young, G.D., The John Frederick Lewis Collection - Part II, Materiali per il Vocabolario Neosumerico 13, Rome 1984 |
| 2 | Tsouparopoulou, C., The Ur III Seals Impressed on Documents from Puzriš-Dagān (Drehem), Heidelberger Studien zum Alten Orient 16, Heidelberg 2015 |
| 3 | Cripps, E.L., "The Structure of Prices in the Neo-Sumerian Economy (I); Barley: Silver Price Ratios", Cuneiform Digital Library Journal 2017: 2, 44 pp. |
| http://cdli.mpiwg-berlin.mpg.de/P117652 |
| http://oracc.museum.upenn.edu/epsd2/P117652 |