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| 1 | Legrain, L., Business Documents of the Third Dynasty of Ur, Ur Excavations Texts 3, London 1937 |
| 2 | Durand, J.-M., "Relectures d'ARMT VIII, II: ARMT VIII, 89 et le travail du métal à Mari", Mari. Annales de Recherches Interdisciplinaires 2 (1983) 123-139 |
| 3 | Civil, M., The Farmer's Instructions. A Sumerian Agricultural Manual, Aula Orientalis - Supplementa 5, Sabadell 1994 |
| http://cdli.earth/P137439 |
| http://oracc.museum.upenn.edu/epsd2/P137439 |
| http://www.ebl.lmu.de/library/U.unn.7 |