Undertake a search for articles which match your interest, then focus on the most periodicals featured. The publications appearing most often should, in theory, be the ones to focus on. Of course article length may also give you a clue. We can use the free online article databases - but unless you have a single unique term to search for, we suggest you don't. Special Collection comes from 5,400 periodicals, some newspapers, some serials.
Northern lights is light on content in comparison.
To do this right, you must make use of one of the commercial databases that cover your field. This may seem like a lot of effort just to select the publications you want. Certainly, there is always the backdoor approach of contacting a librarian from a specialist library and getting advice. Sometimes the simple approach is the best. In a small way, this approach works for individual researchers too.