000 00284nam a2200097Ia 4500
008 220729s1997 xx 000 0 und d
041 _aeng
100 _aBisset.R
245 _aDifferential diagnosis in obstetric and gynecologic ultrasound
260 _aLondon
_bWB Saunders Company
_c1997
999 _c130601
_d130601