TY  - BOOK
AU  - Beck,William W.
TI  - Obstetrics and gynecology
T2  - The national medical series for independent study
SN  - 0683062417
U1  - 618.076 
PY  - 1993///
CY  - Philadelphia
PB  - Harwal
KW  - Ginecología
KW  - Obstetricia
ER  -