Peter Yarrow, the singer-songwriter best known as one-third of Peter, Paul and Mary, the folk music trio whose impassioned harmonies transfixed millions as they lifted their voices in favor of civil ...

Mr. Yarrow was best known as one-third of Peter, Paul, and Mary, the folk-music trio whose impassioned harmonies transfixed ...

The folk trio he formed with Noel Paul Stookey and Mary Travers became a pop phenomenon, scoring hits like “If I Had a Hammer” and “Puff the Magic Dragon.” ...

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