  | 
          
            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. 
           | 
         
        
        
       
        
         
          
           | Description | 
           
             English: Robert Hofstadter 
            | 
          
          
           | Date | 
           1961 | 
          
          
           | Source | 
            http://nobelprize.org/nobel_prizes/physics/laureates/1961/hofstadter-bio.html | 
          
          
           | Author | 
           Nobel foundation | 
          
          
           Permission ( Reusing this file) | 
           
            
             
              | Public domainPublic domainfalsefalse | 
              
             
            
             
              | 
               
               | 
              This Swedish photograph is free to use under one of the following cases:
                - For photographic works (fotografiska verk), the image is in the public domain:
 
                
               
                - 
                 
                  - a) if the photographer died before January 1, 1944, or
 
                  - b) if the photographer is not known, and cannot be traced, and the image was created before January 1, 1944.
 
                  
                 
                
               
                - For photographic pictures (fotografiska bilder), such as images by the press, the image is in the public domain if created before January 1, 1969 ( transitional regulations 1994).
 
                
                
               
                - 
                 
                  - The photographer, if known, should always be attributed.
 
                    - 
                     
                      - Always provide source information.
 
                      
                     
                    
                   
                  
                 
                
                
               | 
              
               
               | 
              
             
              |  English |  español |  suomi |  italiano |  македонски |  português do Brasil |  română |  русский |  svenska |  +/− | 
              
               | 
              
             
            | 
          
         
         
        
        
        
       File usage
       
        The following pages on Schools Wikipedia link to this image (list may be incomplete):
        
        
       
      You can learn about nearly 6,000 different topics on Schools Wikipedia. Thanks to SOS Childrens Villages, 62,000 children are enjoying a happy childhood, with a healthy, prosperous future ahead of them. There are many ways to help with SOS Children's Villages.