xBookUtils.terms['fn_13_501'] = "Peter Passell, “Economics Nobel to a Basic Thinker,” New York Times, October 16, 1991, p. D6.";
xBookUtils.terms['fn_13_502'] = "George Stigler, Memoirs of an Unregulated Economist (New York: Basic Books, 1988), p. 76.";
xBookUtils.terms['fn_13_503'] = "Garrett Hardin, “The Tragedy of the Commons,” Science 162, 1968, pp. 1243–1248.";
xBookUtils.terms['fn_13_504'] = "Daniel Yergin, The Prize (New York: Simon & Schuster), 1991.";
xBookUtils.terms['fn_13_505'] = "IPCC, 2014: Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Core Writing Team, R.K. Pachauri and L.A. Meyer (eds.)]. IPCC, Geneva, Switzerland, 151 pp.";