If you're looking for words, music and some discussion then some of the individual threads are useful (e.g. The Origin of Sea Chanteys). Try typing WORK SONGS into the Forum Search at the top left of the forum screen, which should get you quite a lot.
You could also try looking for books in various sections of the Basic Folk Library PermaThread. The Genres/Shanties and Worksongs section might be useful, as is Courlander's book in Genres/Black.
BTW, what would non-ethnic folk music sound like?