1.
Rev. panam. salud pública
;
11(4): 253-261, abr. 2002.
Article
in Spanish
| LILACS
| ID: lil-323724
2.
Rev. panam. salud pública
;
10(1): 45-55, jul. 2001.
Article
in Spanish
| LILACS
| ID: lil-323790