000 00300nam a2200097Ia 4500
008 220809s1991 xx 000 0 und d
041 _aeng
245 _aObstetrics and Gynecology clinics of North America Vol.18, No.3 Sept 1991
260 _aPhiladelphia
_bWB Saunders Co
_c1991
520 _aBack Volume
999 _c158800
_d158800