1.
Bull. W.H.O. (Print)
; 54(4): 411-416, 1976.
Article
in English
| WHOLIS
| ID: who-260926
2.
Bull. W.H.O. (Print)
; 59(4): 555-560, 1981.
Article
in English
| WHOLIS
| ID: who-262160
3.
Bulletin of the World Health Organization (WHO)
; 54(4): 411-6, 1976.
Article
in English
| PAHO
| ID: pah-4770
4.
Bulletin of the World Health Organization (WHO)
; 59(4): 555-60, 1981.
Article
in English
| PAHO
| ID: pah-6075