00354nam a2200157Ia 4500008004100000020001800041035001000059082001500069100002200084245003800106250000600144260002200150300000800172500001000180650000600190210723s9999||||xx |||||||||||||| ||und||  a0-435-60226-8  a28094  a574.5BDOW  aDowdeswell, W. H. 0aEcology : Principles And Practice  a-  aLondonbHeinemann  a176  a23352  a-