000 00282nam a2200097Ia 4500
008 220809s1990 xx 000 0 und d
041 _aeng
245 _aClinical Obstetrics and Gynecology Vol.33, No.3,Sept 1990
260 _aPhiladelphia
_bJB Lippncott
_c1990
520 _aBack Volume
999 _c158757
_d158757