TY  - BOOK
AU  - Sachs,Benjamin P.
AU  - Acker,David
TI  - Clinical obstetrics :  a public health perspective 
SN  - 0884165132
AV  - RG526 .C55 1986
PY  - 1986///
CY  - Littleton, Mass. 
PB  - PSG Pub. Co.
KW  - Obstetrics
KW  - Epidemiology
KW  - Epidemiologic Methods
ER  -