TY  - GEN
AU  - Callen , Peter W.
TI  - Ultrasonography in obstetrics and gynecology
SN  - 9788131212837
U1  - 618.32 
PY  - 2008///
CY  - Philadelphia
PB  - Saunders Elsevier
KW  - ultrasonography in Obs & Gynecology
UR  - www.elsevier.com
ER  -