| aerohost.com | Search Engine Tips |
| searchenginewatch.com | Search Engine Watch: Search Engine Submission Tips |
| search-engine-secrets.net | Ronny Skog |
| msus.edu | Precision Among World Wide Web Search Services |
| socengine.com | SEOSurvey: MSN's Beta Search vs. Yahoo! and Google |
| ppc-searchengines.info | PPC-Search Engines |
| infopeople.org | InFoPeople: Best Search Tools Chart |
| asis.org | Search Engines for the World Wide Web: A Comparative Study and Evaluation Method |
| ala.org | Tool Kit for the Expert Web Searcher |
| albany.edu | How to Choose a Search Engine or Directory |
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