Use subject searching for a broad subject. Note the circulation status. When you pull the book from the shelf, scan the bibliography for additional sources. More detailed instructions for the GIL catalog to find books. Periodical indexes index magazines, journals and newspapers.
Periodical indexes provide access to the content of individual periodical titles.
Read the summaries of these articles. Pay close attention to other headings that are used to identify the articles you are interested in. All of the indexes you will be using will contain a citation. Many indexes also contain an abstract to the article. An abstract includes a summary of what each article is about.