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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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           | Description | 
           
             English: a boy looking at a molecule model 
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           | Date | 
           2007-09-16 (original upload date) | 
          
          
           | Source | 
           Originally from  en.wikipedia; description page is/was  here. | 
          
          
           | Author | 
           Original uploader was  Poindexter Propellerhead at  en.wikipedia | 
          
          
           Permission ( Reusing this file) | 
           
             Licensed under the  GFDL by the author; GFDL-SELF-NO-DISCLAIMERS; Released under the  GNU Free Documentation License. 
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        Licensing 
        
         
          
            Poindexter Propellerhead at the  English language Wikipedia, the copyright holder of this work, hereby publishes it under the following license:
           
            
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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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