TY  - BOOK
AU  - 
TI  - Society of Perinatal Obstetricians : the first two decades
AV  - RG600  D11
PY  - 1997///
CY  - Washington, D.C. : 
PB  - Society of Perinatal Obstetricians, 
KW  - Obstetrics -- History. Obstetrics -- history Obstétrique -- Histoire. Obstetrics
ER  -