| Bibliography |  Suggestions |
| 1 | Yıldız, F. - Gomi, T., Die Umma-Texte aus den Archäologischen Museen zu Istanbul. Band III (Nr. 1601-2300), Bethesda 1993 |
| 2 | Pottorf, A.R., Social Stratification in Southern Mesopotamia during the Third Dynasty of Ur (ca. 2100–2000 BCE), Ph.D. Diss., Harvard University 2022 |
| http://oracc.museum.upenn.edu/epsd2/P139990 |
| http://cdli.earth/P139990 |