“Thirty years ago, four L.A. guys spun out of three illustrious Sixties bands — the Byrds, Buffalo Springfield and the Hollies — and, with a name that sounded like a law firm, achieved sonic immortality. On 1970’s Déjà Vu, Crosby, Stills, Nash and Young restructured folk music to behave with the idiosyncratic freedom of the […]”