The Ritchie Family of Kentucky
This may be old news to many of you but I just ran across " The Ritchie Family of Kentucky " on the Smithsonian Folkways site at http://www.folkways.si.edu/the-ritchie-family-of-kentucky/american-folk-old-time/music/album/smithsonian
You can also download the 26 page liner notes (14.5 MB) free even if you don't get the album: http://media.smithsonianfolkways.org/liner_notes/folkways/FW02316.pdf
I found the liner notes very interesting.