Enlace original:
https://apps.who.int/iris/handle/10665/46293
Barros, Fernando C
,
Victora, Cesar G
,
Vaughan, J. Patrick
,
Estanislau, H. J
,
[Perinatal mortality in southern Brazil : a population-based study of 7392 births / F. C. Barros ... [et al.]]