College researchers often need more than Google and Wikipedia to get the job done. To find what you're looking for, it may be necessary to tap into the invisible web, the sites that don't get indexed by broad search engines. The following resources were designed to help you do just that, offering specialized search engines, directories, and more places to find the complex and obscure.

Search Engines

Whether you're looking for specific science research or business data, these search engines will point you in the right direction.

Databases

Tap into these databases to access government information, business data, demographics, and beyond.

Catalogs

If you're looking for something specific, but just don't know where to find it, these catalogs will offer some assistance.

Directories

Get hand-picked links to high quality research sources with these directories.

Social Media and More

Social media sites are a great way to find content that's obscure or hasn't quite made it to the search engines yet. Use these tools and more to round out your arsenal.

StumbleUpon: This social media site offers a recommendaton system for site discovery. EndNote: This citation tool allows you to search deep web databases from within the program. Reddit: Find unique content on this index. education, libraries, and more. Digg: Digg users submit content that search engines don't find, and often share links before search engines index them. The World Factbook: Find country profiles, flags of the world, and other international information in this searchable book. Del.icio.us: This social bookmarking tool offers searchable tags.

Guides

Use these guides to learn how to fine-tune your search on the invisible web.