00309nam a2200109Ia 450000500170000000800410001708200150005810000200007324500510009326000470014430000080019120260224041034.0260224s9999||||xx |||||||||||||| ||und||  a333.91 ACK  aAckerman, B.A.  4aThe uncertain search for environmental quality  aLondon: Collier Macmillan Publishersc1974  a386