These sources are a good place to start your research and to gain background information. In addition, they may contain excellent bibliographies. However, you should not rely on them as major sources for any research endeavor. The catalogs of Ohio library's colleges and universities are quite comprehensive.
Bibliographies are useful resources.
Once you have found a citation for an article you are interested in the next step is to determine whether or not the Denison Library subscribes to that journal. Others have access to the full-text of some articles. Some of these indexes and abstracts are available only in paper. Others can be accessed electronically. Located in the periodical stacks, this is a definitive periodical in the field of Shakespeare research.