| Bibliography |  Suggestions |
| http://cdli.earth/P277524 |
| http://www.penn.museum/collections/object.php?irn=570975 |
| http://www.ebl.lmu.de/library/N.2435 |
|
| http://cdli.earth/P277524 |
| http://www.penn.museum/collections/object.php?irn=570975 |
| http://www.ebl.lmu.de/library/N.2435 |