1.
World health forum
; 12(4): 483-498, 1991.
Article
in English
| AIM
| ID: biblio-1273796
2.
Foro mundial de la salud
; 12(4): 497-503, 1991.
Article
in Spanish
| AIM
| ID: biblio-1262075
3.
Forum mond. santé
; 12(4): 533-540, 1991.
Article
in French
| AIM
| ID: biblio-1262120