| Bibliography |  Suggestions |
| 1 | Contenau, G., Umma sous la dynastie d'Ur, Paris 1916 |
| 2 | Tsouparopoulou, C., The Ur III Seals Impressed on Documents from Puzriš-Dagān (Drehem), Heidelberger Studien zum Alten Orient 16, Heidelberg 2015 |
| http://oracc.museum.upenn.edu/epsd2/P139544 |
| http://cdli.mpiwg-berlin.mpg.de/P139544 |