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Why use the Library when everything is on the web for free? Well everything is not on the web and everything on the web is not free.
Your professors will expect you to use academic resources such as books and journals. Most of our journals and many of our books are now available electronically. And we have over 100 databases to help you find information for your projects and research. But most of our ejournals, ebooks, and databases can't be found with Google and other search engines.
Take advantage of the expensive resources available to you. Start your research at the Library!