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        Summary 
        
         
          
           | DescriptionNational park stone tools.jpg | 
           
             A variety of tools made of mussel shells. 
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           | Date | 
           
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           | Source | 
           U.S. National Park Service,  Mississippi River Mussels:  Tools From Mussel Shells | 
          
          
           | Author | 
           
             This file is lacking author information. 
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          - ↑ U.S. National Park Service,  Introduction To Mussels/Economic Uses
 
         
         
         Licensing 
        
         
          | Public domainPublic domainfalsefalse | 
         
        
        
         
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          This image or media file contains material based on a work of a  National Park Service employee, created as part of that person's official duties. As a  work of the  U.S. federal government, such work is in the  public domain. See the  NPS website and  NPS copyright policy for more information. 
           
            
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       File usage
       
        The following pages on Schools Wikipedia link to this image (list may be incomplete):
        
        
       
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