The Easy Riders (Terry Gilkyson, Richard Dehr and Frank Miller) released the album "Blue Mountain" in 1957 and in it is the first recording of "Green Fields" as composed by the trio.
Bob Flick, Mike Kirkland, John Paine and Dick Foley were The Brothers Four. They hit the top ten in 1960. "Green Fields" was only their second single release from their self-titled debut album. The song hit number two on the charts!