Periodical indexes also aid in identifying journal articles. The greatest exception would be the web site. If not, you may request the item through interlibrary loan. This would be another good place to check for useful materials. These very similar databases index journal, magazine and newspaper articles.
Many entries contain the full text of the article.
You will need a password to access the databases. This would be another good place to check for useful materials. Subject guides are extremely selective. It then ranks the Web pages based on how relevant they are to your search terms. Standard search engines are not selective.