00410nam a2200133Ia 4500008004100000082001600041100001800057245008900075260004600164300000800210650002300218650001800241653001700259170901s1973    xx            000 0 und d  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 ecolgy