TY - BOOK AU - Chudleigh,Patricia AU - Pearce,J.Malcolm TI - Obstetric ultrasound: how, why and when SN - 0443042071 PY - 1992/// CY - Edinburgh PB - Churchill Livingstone. KW - Pregnancy complications KW - Diagnosis KW - Prenatal Diagnosis KW - methods KW - Ultrasonography KW - In pregnancy ER -