Some may include a good bibliography. These books are located on the first floor of the library. These databases lead you to journal articles, only some of which are primary literature. Once you have found a citation for an article, the next step is to determine whether or not Denison subscribes to that journal and, if so, where you can find it in the library. Periodicals are generally found in the Denison Library on the second tier.
Some articles are available full-text.
Click here for example.