TY - DATA AU - Smith,Norman C. AU - Smith,A.Pat M. TI - Obstetric ultrasound made easy SN - 044307013X PY - 2002/// CY - Edinburgh PB - Churchill Livingstone KW - Ultrasonography, Prenatal KW - methods KW - Ultrasonography, Interventional KW - Embryo and Fetal Development N1 - Includes bibliographical references (p. 177-178) and index ER -