Pete you are a little off beam. At least three of the above if not all four in one form or another show up in both black and white tradition.
Jerry Silverman is only one of many Jewish performers and writers who have documented the American folk and blues tradition and done much over the years to keep it alive and kicking.
My own personal feeling regarding Jerry's printed songs are that there seem to be too many chords. A little too sophisticated for my taste.

Hoot