00271nam a2200109Ia 4500008004100000082002000041100002200061245001500083260004200098300001000140650001100150140113s9999    xx            000 0 und d  a581.824(021) K9  a"Esau, Katherine"  aThe phloem  b"Berlin : Gebruder Borntraeger, 1969"  a505p.  aPhloem