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| 1 | Legrain, L., Business Documents of the Third Dynasty of Ur, Ur Excavations Texts 3, London 1937 |
| 2 | Civil, M., The Farmer's Instructions. A Sumerian Agricultural Manual, Aula Orientalis - Supplementa 5, Sabadell 1994 |
| 3 | Maekawa, K., "Confiscation of private properties in the Ur III period: a study of é-dul-la and níg-GA", Acta Sumerologica 18 (1996) 103-168 |
| 4 | Steinkeller, P., "Two Sargonic Seals from Urusagrig and the Question of Urusagrig's Location", Zeitschrift für Assyriologie 112 (2022) 1-10 |
| http://cdli.earth/P137697 |
| http://www.ur-online.org/subject/4104/ |
| http://www.britishmuseum.org/collection/search?museum_number=130428 |
| http://oracc.museum.upenn.edu/epsd2/P137697 |
| http://www.ebl.lmu.de/library/BM.130428 |