1.
Salud pública Méx
;
28(5): 473-9, sept.-oct. 1986. tab
Article
in Spanish
| LILACS
| ID: lil-63945
2.
Salud pública Méx
;
28(5): 515-20, sept.-oct. 1986. tab
Article
in Spanish
| LILACS
| ID: lil-63957