00305nam a2200109Ia 4500082001900000100003900019245005400058260003300112300001400145500000500159700003100164  a333.7bD695.EE  aDorfman, Robert and Dorfman, N. S.  aEconomics of the environment; selected readingsb  aNew YorkbW. W. Nortonc1972  axi, 426p.  a  aDorfman, N. S. ; jt. auth.