000 00281nam a2200097Ia 4500
008 220809s1989 xx 000 0 und d
041 _aeng
245 _aClinical Obstetrics and Gynecology Vol.32, No.4, Dec 1989
260 _aPhiladelphia
_bJB Lippncott
_c1989
520 _aBack Volume
999 _c158755
_d158755