Journals are often referred to as periodicals or serials because they are published at regular intervals - weekly, monthly or annually like newspapers and magazines.
Journals are generally published with a volume and issue number and these are important to use when referencing a journal article.
Enter the title you are searching for e.g. Archaeology Ireland.
A list of publications will appear with the results closest to your search terms at the top with all available full text resources for each journal title displaying as in the example below of Archaeology Ireland.
For more details see this guide