TY  - JOUR
A1  - Yang, Q.
A1  - Greenland, S.
A1  - Flanders, W.D.
T1  - Associations of maternal age- and parity-related factors with trends in low-birthweight rates: United States, 1980 through 2000
Y1  - 2006
DO  - 10.2105/AJPH.2004.049312
JF  - American Journal of Public Health
VL  - 96
IS  - 5

ER  -