All my Norse mythology was gained from a set of 3 books called the Golden Pathway which my dad had when he was a kid and gave to me. Wonderful books, but they covered all the various mythologies along with a collection of stories and poems, so you can imagine they were quite basic (as well as being very old lol, I would imagine they were printed sometime around the 1920s). I have read various other things over the years, but not exhaustively by any means so it would have been easy to miss bits. I shall have to look out for those 2 books.