1.
Article
| PAHO-IRIS
| ID: phr-45941
2.
Washington, D.C; Organización Panamericana de la Salud; 1998. 140p
Monography
in Spanish
| PAHO
| ID: pah-192273
3.
Boletín de la Oficina Sanitaria Panamericana (OSP)
; 93(3): 256-60, sept. 1982.
Article
in Spanish
| PAHO
| ID: pah-16084
4.
Bol. Oficina Sanit. Panam
; 93(3): 256-260, sept. 1982.
Article
in Spanish
| LILACS
| ID: lil-373224