TY  - JOUR
A1  - Ventura, S.J.
A1  - Hamilton, B.E.
A1  - Mathews, T.J.
A1  - Chandra, A. 
T1  - Trends and variations in smoking during pregnancy and low birth weight: Evidence from the birth certificate, 1990–2000
Y1  - 2003
JF  - Pediatrics 
VL  - 111
IS  - 5

ER  -