WorldCat is the world's largest network of library content and services. WorldCat lets you search the collections of libraries in your community and thousands more around the world. You can search many libraries at once for an item and then locate it in a library nearby or request an interlibrary loan.

Help in choosing or narrowing your topic, choosing the right sources, and finding background information.

Help to find books by title, author, and generally on your topic.

Help finding articles when you have a citation, when starting searching on a particular topic, and to identify scholarly articles.

Help supporting your conclusions, judging reliability and relevance of sources, and explaining the the differences between popular and scholarly articles.