| Bibliography |  Suggestions |
| http://cdli.earth/P275990 |
| http://www.penn.museum/collections/object.php?irn=569567 |
| http://www.ebl.lmu.de/library/N.829 |
|
| http://cdli.earth/P275990 |
| http://www.penn.museum/collections/object.php?irn=569567 |
| http://www.ebl.lmu.de/library/N.829 |