00421nam a22001217a 4500020002100000082002000021100003800041245004300079260003800122300004000160500001900200650008000219  a8180613674 (pbk)  a616.207543bSIN  aSingh, KuldeepaNarendra Malhotra  aStep by step ultrasound in obstetrics   aNew DelhibJaypee Brothers c2004  axi, 166 p.b: ill. (col.)c; 18 cm.  aIncludes index  aUltrasonography vObstetrics ultrasound vColor doppler vNuchal skin vPRH