TY  - BOOK
AU  - Niswander,Kenneth R.
TI  - Manual of obstetrics: Diagnosis and therapy 
SN  - 0316611468
AV  - RG531 M35
PY  - 1980///
CY  - Boston
PB  - Little, brown
KW  - Obstetricia
KW  - Manuales
ER  -