Which artist did Neil Young cover, in his thirty-fourth studio album, that has been referred to as Canada's greatest songwriter? 
A Letter Home: A Letter Home is the thirty-fourth studio album by Canadian musician Neil Young. A Letter Home:  The entire album, which consists of covers of classic songs by artists Bruce Springsteen, Bob Dylan, Willie Nelson, Gordon Lightfoot and others, was recorded in a refurbished 1947 Voice-o-Graph vinyl recording booth at Jack White's Third Man Records recording studio in Nashville, Tennessee. Gordon Lightfoot:  He has been referred to as Canada's greatest songwriter and internationally as a folk-rock legend.
Gordon Lightfoot