TY  - JOUR 
T1  - Maternal age, social changes, and pregnancy outcome in Ribeirão Preto, southeast Brazil, in 1978-79 and 1994
JO  - Cadernos de Saúde Pública
A1  - Goldani, Marcelo Zubaran
A1  - Bettiol, Heloisa
A1  - Barbieri, Marco Antonio
A1  - Tomkins, Andrew
SN  - 0102-311X
UL  - 10.1590/S0102-311X2000000400022
VL  - 16 
Y1  - 2000
PB  - Brasil 
ER  -