1.
Washington, D.C; Organización Panamericana de la Salud; 1990. 9 p. graf.
Monography
in Spanish
| LILACS
| ID: lil-368954
2.
Washington, D.C; Pan Américan Health Organization; 1990. 9 p. tab.
Monography
in English
| LILACS
| ID: lil-369293