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1 | Legrain, L., Business Documents of the Third Dynasty of Ur, Ur Excavations Texts 3, London 1937 |
2 | Simkó, K., "Emery abrasive used in the lapidary craft of the Ur III period? Some further remarks on the stone ú-na4-gug and its Old Babylonian counterpart", Aula Orientalis 33 (2015) 141-155 |
http://www.ur-online.org/subject/3982/ |
http://www.britishmuseum.org/collection/search?museum_number=130267 |
http://oracc.museum.upenn.edu/epsd2/P137017 |
http://www.ebl.lmu.de/fragmentarium/BM.130267 |
http://cdli.mpiwg-berlin.mpg.de/P137017 |