00383pab a2200133 454500008004000000100002100040245005800061260000900119300001100128362000900139650003300148700002100181773004700202180718b1987   xxu||||| |||| 00| 0 eng d  aKopp, Raymond J.  aAgricultural policy and the benefits of Ozone control  c1987  a956-62  aDec.  aAgricultural Policy - U.S.A.  aAlan J. Krupnick  aAmerican Journal of Agricultural Economics