Journal titles are listed in the Library's catalogue. However, if you need to find an article in a journal you will need to use an index or online database.
An index will only give you the details about an article. The information in the index will include the author, title of the article, the name of the journal, volume, issue and page numbers. They may also have a small abstract which will provide you with an idea of what the article is about.
A full-text database will give you the full article, which you may print-out or, in most cases, email to yourself.
Remember, all of these articles must appear in your reference list.