003580000a22001330004500020001500000060000800015082001200023100001700035245008600052260002800138260000900166300000800175650004100183  a0851987133  a100  a631 HAN  aHanley, Nick  aFarming and the countryside : an economic analysis of external costs and benefits  aU.K., CAB International  c1991  a328  aEnvironment - effects of agriculture