In addition to articles, books, and Web sources, you may want to consult reference works such as encyclopedias and almanacs. Bibliographies (lists of works written on a topic) and citations in scholarly works can lead you to additional sources.
The reference section of the library holds both general and specialized encyclopedias, dictionaries, almanacs, atlases, and biographical references, some available in electronic format. Such works often serve as a good overview of a subject and include references to the most significant works on a topic. Check with a reference librarian to see which works are most appropriate for your project.