1.
Bulletin of the World Health Organization (WHO)
; 58(2): 297-311, 1980.
Article
in English
| PAHO
| ID: pah-5984
2.
Bulletin of the World Health Organization (WHO)
; 54(6): 657-62, 1976.
Article
in English
| PAHO
| ID: pah-4797
3.
Bulletin of the World Health Organization (WHO)
; 41(3): 367-73, 1969.
Article
in English
| PAHO
| ID: pah-38930
4.
Bulletin of the World Health Organization (WHO)
; 32(6): 779-89, 1965.
Article
in English
| PAHO
| ID: pah-37962