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Bearden, C.F.: CD-ROM telephone directories : why librarians should consider them and what to look for (1994)
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Boettcher, J.; Kingma, B.R.: Telephone directories : alternatives to print (1994)
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Rudich, J.: CD-ROM telephone directories (1996)
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Pastrone, M.J.: ¬The resource directory (1995)
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Sherman, C.; Price, G.: ¬The invisible Web : uncovering sources search engines can't see (2004)
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