00436nam a2200145Ia 4500008004100000020001500041082001600056100001600072245008900088260004600177300000800223650002300231650001800254653001800272170901s1973    xx            000 0 und d  a0045810109  a581.5bW53I  aWillis,A.J. 0aIntroduction to Plant EcologybGuide for Beginners in the Study of Plant Communities  aLondonbGeorge Allen and Unwin Ltd.c1973  a237  aBotanical sciences  aPure Sciences  aPlant Ecology