| Bibliography |  Suggestions |
| 1 | Koslova, N., Ur III- Texte der St. Petersburger Eremitage, Santag 6, Wiesbaden 2000 |
| 2 | D’Agostino, F. - Gorello, F., “The Control of Copper and Bronze Objects in Umma During the Ur III Period”, S. Garfinkle - M. Molina (eds.), From the 21st Century BC to the 21st Century AD. Proceedings of the International Conference on Neo-Sumerian Studies Held in Madrid, July 22-24, 2010, Winona Lake 2013, pp. 251-265 |
| http://cdli.mpiwg-berlin.mpg.de/P211523 |
| http://oracc.museum.upenn.edu/epsd2/P211523 |