TY  - JOUR
A1  - Kyrklund-Blomberg, N.B.
A1  - Cnattingius, S.
T1  - Preterm birth and maternal smoking: Risks related to gestational age and onset of delivery
Y1  - 1998
DO  - 10.1016/S0002-9378(98)70214-5
VL  - 179
IS  - 4

ER  -