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  • × author_ss:"Balas, J."
  1. Balas, J.: ¬The online treasures of the Library of Congress (1996) 4.07 
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  2. Balas, J.: ¬The Internet and reference services (1995) 4.07 
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  3. Balas, J.: ¬The importance of mastering search engines (1998) 4.07 
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