UNI search engine for books and articles.
For books choose "Books/Media" to turn OneSearch into the library catalog and look for books owned by Rod Library. To find primary materials set your search or results ("Publication Date") to the specific years of your study.
Note - adding the search term "history" to an additional search blank and changing the dropdown menu to "Subject" at the front of the search blank.
Though the links above and below go to the Chicago quick guide - the full print Chicago Manual of Style is available for more complicated questions. These large print volumes can be found both at the Library Services Desk and in the Stacks.