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Navigator Sites
 | search engines
 | “purpose built” searches of the web with specific queries
| | don’t expect precision of bibliographic searches
| | advantages & disadvantages (too much or too little, out of context)
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| catalogues
| collect & organize sites for browsing
| | allow searches of what they have collected
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| evaluated sites
| like catalogues, they have a repertoire
| | they add extra value in description or approval of some kind
| | try hard to locate criteria for each service | |
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