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Metz, R.: Directory of directories on the Internet (1992)
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Klau, P.; Klau, M.: ¬Das Internet-Adreßbuch (1995)
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Gale guide to Internet databases (1995)
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Newby, G.: Directory of directories on the Internet : a guide to information sources (1994)
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Hahn, H.: Harley Hahn's Internet & Web Yellow pages 1997 edition (1996)
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Braun, E.: ¬The Internet directory : [the guide with the most complete listings for: 1500+ Internet and Bitnet mailing lists, 2700+ Usenet newsgroups, 1000+ On-line library catalogs (OPACs) ...] (1994)
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