1.
World health forum
; 12(2): 175-180, 1991.
Article
in English
| AIM
| ID: biblio-1273788
2.
Foro mundial de la salud
; 12(2): 189-194, 1991.
Article
in Spanish
| AIM
| ID: biblio-1262067
3.
Forum mond. santé
; 12(2): 198-203, 1991.
Article
in French
| AIM
| ID: biblio-1262113