000			00467nam a2200157Ia 4500
008			160608s9999 xx 000 0 und d
100			_aSpengler, Joseph J, ed. _913183
245			_aNatural resources and economic growth
260			_aWashington, D C
260			_bResources for the future, inc.
260			_c1961
300			_ax,306p.; 25cm.
650			_aEconomic development _9448
650			_aInternational trade _9364
650			_aTechnological progress _9494
999			_c44699 _d44699