1.
World health forum
; 11(4): 451-454, 1990.
Article
in English
| AIM
| ID: biblio-1273773
2.
Foro mundial de la salud
; 11(4): 459-462, 1990.
Article
in Spanish
| AIM
| ID: biblio-1262053
3.
Forum mond. santé
; 11(4): 489-492, 1990.
Article
in French
| AIM
| ID: biblio-1262098