? , Jean Ritchie, John McCutcheon, ? Michael Kline, Lorraine Duisit, Sam Rizzetta
The curly haired girl between McCutcheon and Duisit is not Freyda Epstein, who was there with the other members of Trapezoid, but is not on stage for this picture.
Jean Ritchie giving a dulcimer workshop on the second stage. Other person unknown?
This is a daughter (possibly granddaughter?) of John Jacob Niles. (Name?) Niles was scheduled to appear, but had taken ill and died the following March (1980).