1.
Santiago de Chile; Ministerio de Salud; nov. 1995. 46 p.
Monography
in Spanish
| LILACS
| ID: lil-194642
2.
Santiago de Chile; Atena; 1993. 193 p.
Monography
in Spanish
| LILACS
| ID: lil-131171
3.
Bol. Oficina Sanit. Panam
;
94(1): 103-112, ene. 1983.
Article
in Spanish
| LILACS
| ID: lil-373675