The regular search engines can’t see beyond the front page of an estimated 200,000 sites with information in databases. This is information that is usually developed by experts in the field. TechLearning’s “Delving Into the Deep End of the Web” has a list of tools that can search these resources. To make it even better, there are tips for specific tools.
Very handy for building Webliographies and Pathfinders!
From Educational Technology