Bibliographic databases are important resources for finding secondary sources, especially scholarly/peer-reviewed journal articles. Here are a few key ones:

Please note: the full text of articles will not always be available in these databases. If you see the "YaleLinks" icon instead of a PDF, click on the icon to discover whether we have online access to the article. We may have the article in print even if we do not have access to it online. Articles that are not part of the library's collection can be requested via Interlibrary Loan, which is part of the Get It @ Yale service.

And, don’t forget, Orbis, Books+ and Articles+ are all important tools for locating secondary sources!