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Balas, J.: ¬The Internet and reference services (1995)
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- Computers in libraries. 15(1995) no.6, S.39-41
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Balas, J.: ¬The online treasures of the Library of Congress (1996)
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- Computers in libraries. 16(1996) no.5, S.41-43
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Balas, J.: ¬The importance of mastering search engines (1998)
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- Computers in libraries. 18(1998) no.5, S.42-44