By Moren, Folke, etc., Newhouse, M.T., Dolovich, M.B.
By Barbier, Edward, Burgess, JoAnne, Folke, Carl
By Chapin III, F Stuart, Kofinas, Gary P., Folke, Carl, Chapin, M.C.
By Perrings, Charles, Maler, Karl-Goran, Folke, Carl, Holling, C. S., Jansson, Bengt-Owe