00459nam a2200181Ia 4500008004100000020001500041082001800056100002500074245003100099250000600130260004500136300000800181650001800189650001800207653002300225653001200248653001700260170901s1975    xx            000 0 und d  a0024273902  a574.524bW43C  aWhittaker, Robert H. 0aCommunities and Ecosystems  a2  aNew YorkbMacmillan Publishing Co.c1975  a385  aLife sciences  aPure Sciences  aBiotic communities  aEcology  aSoil ecology