| Bibliography |  Suggestions |
| 1 | Keiser, C.E., Selected Temple Documents of the Ur Dynasty, Yale Oriental Series 4, New Haven 1919 |
| 2 | 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://collections.peabody.yale.edu/search/Record/YPM-BC-016014 |
| http://collections.peabody.yale.edu/search/Record/YPM-BC-016014 |