TY  - JOUR 
T1  - Do socioeconomic factors explain why maternal smoking during pregnancy is more frequent in a more developed city of Brazil?
JO  - Brazilian Journal of Medical and Biological Research
A1  - Ribeiro, V.S.
A1  - Figueiredo, F.P.
A1  - Silva, A.A.M.
A1  - Batista, R.L.F.
A1  - Barbieri, M.A.
A1  - Lamy Filho, F.
A1  - Alves, M.T.S.S.B.
A1  - Santos, A.M.
A1  - Bettiol, H.
SN  - 0100-879X
UL  - 10.1590/S0100-879X2006005000146
VL  - 40 
Y1  - 2007
PB  - Brasil 
ER  -