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  1. The Value of Non-Commercial Web Directories

    Resource Discovery Network http://rdn.ac.uk Began in early 1997 although the many subject portals that populate the RDN began several years earlier. The RDN "Resource Finder" offers the ability to search many subject specific "portals" simultaneously.

  2. The Search Engine Update, December 18, 2001, Number 115

    Gateway to the Invisible Web SearchDay, Dec.http://searchenginewatch.com/searchday/01/sd1204-rdn.html The Resource Discovery Network is an outstanding gateway to thousands of Invisible Web sites that's as close to a search engine for the hidden web...