000			00288nam a2200121Ia 4500
082			_a614.71 _bRID
100			_aRidker, Ronald G.
245			_aEconomic costs of air pollution.
260			_aNew York _bPraeger Pub. _c1967
300			_a215p.
890			_aUnited States
999			_c8895 _d8895