00309nam a2200145Ia 4500008004100000082000900041082001000050100000700060100001000067245003200077260001000109260002300119260000900142650001200151240117s9999||||xx |||||||||||||| ||und||  aV./A  b581.5  av.  averma 2aa textbook of plant ecology  adelhi  bemkay publications  c1972  abiology