1.
Article
in Spanish
| WHO IRIS
| ID: who-52014
2.
Article
in French
| WHO IRIS
| ID: who-46206
3.
Article
in English
| WHO IRIS
| ID: who-53371
4.
World Health Forum (WHO)
; 12(3): 332-5, 1991.
Article
in English
| PAHO
| ID: pah-10754
5.
Foro Mundial de la Salud (OMS)
; 12(3): 349-352, 1991.
Article
in Spanish
| PAHO
| ID: pah-12016
6.
Int Fam Plan Perspect
; 4(2): 50-5, 1978.
Article
in English
| MEDLINE
| ID: mdl-11662718