1.
Salud Publica Mex
; 45 Suppl 2: S255-8, 2003.
Article
in English
| MEDLINE
| ID: mdl-14746013
2.
Salud pública Méx
; 45(supl.2): 255-258, 2003.
Article
in English
| LILACS
| ID: lil-382744