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| 1 | Genouillac, H. de, Textes économiques d'Oumma à l'époque d'Our, Textes Cunéiformes du Musée du Louvre 5, Paris 1922 |
| 2 | Englund, R.K., "Administrative timekeeping in Ancient Mesopotamia", Journal of the Economic and Social History of the Orient 31 (1988) 121-185 |
| 3 | Civil, M., The Farmer's Instructions. A Sumerian Agricultural Manual, Aula Orientalis. Supplementa 5, Sabadell 1994 |
| 4 | Studevent-Hickman, B., The Organization of Manual Labor in Ur III Babylonia, 2 vols., Ph.D. Diss., Harvard University 2006 |
| http://collections.louvre.fr/recherche?q=%22AO+5669%22 |
| http://cdli.earth/P131740 |
| http://oracc.museum.upenn.edu/epsd2/P131740 |