1.
Acta pediátr. costarric
;
10(2): 72-4, 1996.
Article
in Spanish
| LILACS
| ID: lil-215861
2.
Acta pediátr. costarric
;
10(3): 119-22, 1996. ilus
Article
in Spanish
| LILACS
| ID: lil-215869