TY - JOUR A1 - Barnett, H. J. T1 - Natural Resources in the Changing U.S. Economy JF - S. Anderson (Ed.), Planning for Diversity and Choice. Possible Futures and Their Relations to the Man-Controlled Environment, Cambridge, Mass. (The M.I.T. Press) 1968, pp. 117-140. Y1 - 1968 ER -