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| 1 | Legrain, L., Business Documents of the Third Dynasty of Ur, Ur Excavations Texts 3, London 1937 |
| 2 | Sallaberger, W., Der kultische Kalender der Ur III-Zeit, 2 vols, Berlin - New York 1993 |
| 3 | Heimpel, W., "Two Unrecognized Terms in Ur III Accounts of Boat Transport", D.I. Owen (ed.), Garšana Studies, Cornell University Studies in Assyriology and Sumerology 6, Bethesda 2011, pp. 161-175 |
| http://cdli.earth/P136509 |
| http://oracc.museum.upenn.edu/epsd2/P136509 |
| http://www.ebl.lmu.de/library/U.4736 |