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        Summary 
        Knucklebone Dice, usually treated as 4 sided.
        Source:  http://membres.lycos.fr/arjan/
        Author: Arjan
        "All pictures on my web site are made by myself, and you can use them freely." Arjan Verweij
         Licensing 
        
         
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            This is a copyrighted image from the Arjan Dice  web site.  Reproduction is authorized, provided the source link and author name.  Reproduction also authorized under terms of GNU Free Documentation License. Read the  terms of this authorization 
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          Permission is granted to copy, distribute and/or modify this document under the terms of the  GNU Free Documentation License, Version 1.2 or any later version published by the  Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled  GNU Free Documentation License.  http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue 
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       File usage
       
        The following pages on Schools Wikipedia link to this image (list may be incomplete):