1.
Article
in Spanish
| WHO IRIS
| ID: who-53918
2.
Article
in French
| WHO IRIS
| ID: who-49557
3.
Article
in English
| WHO IRIS
| ID: who-49523
4.
World Health Forum (WHO)
; 11(2): 169-72, 1990.
Article
in English
| PAHO
| ID: pah-9775
5.
Foro Mundial de la Salud (OMS)
; 11(2): 169-72, 1990. Tab
Article
in Spanish
| PAHO
| ID: pah-9884
6.
Article
in French
| WHO IRIS
| ID: who-53698
7.
Article
in English
| WHO IRIS
| ID: who-52237
8.
Article
in Spanish
| WHO IRIS
| ID: who-48124
9.
Article
| WHO IRIS
| ID: who-52759
10.
Article
| WHO IRIS
| ID: who-47436