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            This is a file from the  Wikimedia Commons. Information from its  description page there is shown below.  Commons is a freely licensed media file repository.  You can help. 
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        Summary 
        
         
          
           | Description | 
           
             English: Compound of five tetrahedra, Wenninger model 25 
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           | Date | 
           22 October 2005 (original upload date) | 
          
          
           | Source | 
           Transferred from  en.wikipedia. | 
          
          
           | Author | 
           
             This file is lacking author information. 
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        Licensing 
        
         
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          The copyright holder of this file,  Robert Webb, allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other use is permitted. | 
         
         
          | Attribution: Attribution must be given to Robert Webb's  Stella software as the creator of this image along with a link to the website:  http://www.software3d.com/Stella.php. A complimentary copy of any book or poster using images from the Software would also be appreciated where feasible. Attribution 
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          The permission to use this work has been archived in  the Wikimedia OTRS system. It is available as  ticket #2011112810034763 for users with an OTRS account. If you wish to reuse this work elsewhere, please read the instructions at  COM:REUSE. If you are a Commons user and wish to confirm the permission, please leave a note at the  OTRS noticeboard. Ticket link:  https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom&TicketNumber=2011112810034763  
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