Periodicals are continuous publications such as journals, newspapers, or magazines.
To find a periodical article , use periodical indexes. When you don't have a citation to a specific article, but you do want to find articles on a subject, by a specific author or authors, or with a known article title, you need to use one or more periodical indexes . Periodical indexes may be in paper form or in electronic form, or be available in both formats. First determine what kind of periodicals you want. Learn more about the differences among scholarly journals, newspapers, and popular magazines .