Julia, check for Sandy Ives' books. He has written extensively on Maine and the Maritimes. The two lands are inextricably linked. Dr. Ives also has a record called Folk Songs Of Maine. I have a copy.

Another source is Dick Swain. He worked with Dr. Ives and learned a lot from him. he has quite a repertoire of Maine songs. I don't have any contact info for him. he moved to Pennsylvania, I think, and now I only see him once a year at Mystic.