00404nam a2200133Ia 4500008004100000082001600041100001800057245008700075260004600162300000800208650001800216650001800234653001800252170901s1923    xx            000 0 und d  a574.5bT15P  aTansley, A.G. 0aPractical Plant EcologybA Guide for Beginners in Field Study of Plant Communities  aLondonbGeorge Allen and Unwin Ltd.c1923  a231  aLife sciences  aPure Sciences  aPlant ecology