TY  - BOOK
AU  - Callen, PW
TI  - Ultrasonography in obstetrics and gynecology 
SN  - 9781416032649
PY  - 2008///
CY  - Philadelphia
PB  - Saunders Elsevier
KW  - Obstetrics
KW  - Ultrasonography, Prenatal
KW  - Fetal Monitoring
KW  - Fetal Diseases
KW  - diagnosis
KW  - Genital Diseases, Female
N1  - Includes bibliographical references and index
ER  -