Printed journals covering archaeology, museum studies and heritage will be found within the Institute of Archaeology's alphabetical sequence of journals INST ARCH Pers.
Many more titles are available online.
Please be aware that many smaller, specialist journals important for archaeology and heritage, particularly those published outside the UK and USA, are not available electronically. You should always use a balance of electronic and print journals for archaeological research; print journals may be less convenient, but they offer you a range of vital critical perspectives and information.
It's good practice to always check the website of the organisation that produces a print journal before starting your research. The organisation may not have been able to produce an electronic version of their journal, but they often provide electronic indexes, which helps speed up your search. For example: Cornish Archaeology
If you know the title of the article you need, you can enter it directly in the Explore search box. If UCL Libraries have an electronic subscription to the journal in which the article is published, this will appear in your results list and you can download the full-text following the instructions provided. The same applies if you're looking for a journal article using one of the many article-specific UCL Databases.