RMCWANKN–Peter Paul and Mary, (Peter Yarrow, Paul Stookey, Mary Travers), 1960s. Courtesy: CSU Archives / Everett Collection

RMG3ACT0–Folk Singers Peter, Paul and Mary perform at the March on Washington, Left to right: Paul Stookey, Mary Travers and Peter Yarrow.

RM2F3G7GT–Mary Travers Peter Yarrow Paul Stookey 1982 Photo By John Barrett/PHOTOlink / MediaPunch

RMDNKY71–PETER PAUL AND MARY - circa 1960's - Courtesy Granamour Weems Collection. Editorial use only

RMP6DKD9–Mary Travers Peter Yarrow Paul Stookey 1982 Photo By John Barrett/PHOTOlink.net / MediaPunch

RM2FNHNC6–Folksinger Peter Yarrow of the 1960's folk group Peter Paul and Mary.

RF2J8GRF2–Peter, Paul and Mary performing live in concert in Central Park in New York in 1978.

RMRMW69R–The folk singing trio of Peter, Paul and Mary are shown performing on stage during a 'live' concert appearance.

RMPT8R2N–American Folk singers Peter, Paul and Mary arriving at London's heathrow Airport in 1988.

RMMAK4Y0–Mary Travers Peter Yarrow Paul Stookey 1982 Photo By John Barrett/PHOTOlink.net

RMMAM1PD–Mary Travers Peter Yarrow Paul Stookey 1982 Photo By John Barrett/PHOTOlink. Photo via Credit: Newscom/Alamy Live News

RF2HD7K5X–Peter, Paul and Mary performing live in concert in Central Park in New York in 1978.