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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 | Focke, K., Der Garten in neusumerischer Zeit, Alter Orient und Altes Testament 53, Münster 2015 |
| http://cdli.earth/P136589 |
| http://www.ur-online.org/subject/6717/ |
| http://oracc.museum.upenn.edu/epsd2/P136589 |
| http://www.ebl.lmu.de/library/U.7271 |