All of the above. Hard to believe that it was more than 60 years ago but it all started for me with Burl Ives, Richard Dyer-Bennet, Josh White, Josef Marais (before Miranda) and probably tops of them all, Carl Sandburg. Others I have enjoyed and may have missed in the above notes, Oscar Brand, Will Holt, Theodore Bikel, Alan Rowan Summers, Jean Carignan, Walt Robertson, Wade Hemsworth, Alan Mills, Robert Beers.