There are many article databases for finding periodical articles. These databases are often called article indexes, but they are essentially bibliographies that list journal articles.
Most of these include a mixture of academic and popular sources (and remember that sometimes the distinction is not clear).
The resource annotations on this guide were not written by anybody in the History, Philosophy, and Newspaper Library. They were supplied by the Library's Office of Information Literacy. Please be advised that some of the annotations contain content taken verbatim (and without attribution, in other words, plagiarized) from the resource publisher's marketing materials. Many of these plagiarized annotations make exaggerated claims about the resources they describe.