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Music, New York, USA, Circa 1960's, Conductor Leonard Bernstein (left) and pianist Glenn Gould listen to composer & conductor Igor Stravinsky during a rehearsal for the New York Philharmonic Orchestra (Photo by Paul Popper/Popperfoto/Getty Images)

Music, New York, USA, Circa 1960's, Conductor Leonard Bernstein (left) and pianist Glenn Gould listen to composer & conductor Igor Stravinsky during a rehearsal for the New York Philharmonic Orchestra  (Photo by Paul Popper/Popperfoto/Getty Images)