000			00331nam a2200133Ia 4500
008			130223s9999 xx 000 0 und d
100			_aJohn, M.E.
245			_aSocial costs of economic progress
260			_aPennsylvania
300			_a26 p.
440			_aNo. 554; Pennsylvania Agricult
901			_pS21675
942			_cB _2udc
999			_c133522 _d133522