1.
Acta pediátr. Méx
;
14(3): 148-9, mayo-jun. 1993. ilus
Article
in Spanish
| LILACS
| ID: lil-139076
2.
Acta pediátr. Méx
;
13(5): 178-9, sept.-oct. 1992.
Article
in Spanish
| LILACS
| ID: lil-118082