000 00293nam a2200121Ia 4500
008 250224s9999 xx 000 0 und d
020 _a9780435800628
082 _a371.144MAR
100 _aMarriott Grace
245 0 _aobserving teachers at work
260 _bHeinemann
_c2001
942 _cBK
999 _c464440
_d464440