1.
Bol. epidemiol. Antioq
;
11(2): 102-3, abr.-jun. 1986.
Article
in Spanish
| LILACS
| ID: lil-71839
2.
Bol. epidemiol. Antioq
;
9(3): 78, jul.-sept. 1984.
Article
in Spanish
| LILACS
| ID: lil-71802