1.
Washington, D.C; Organización Panamericana de la Salud; 2000. 39 p.
Monography
in Spanish
| LILACS
| ID: lil-381141
2.
Rev. Fed. Odontol. Colomb
;
42(175): 31-44, abr.-jun 1991.
Article
in Spanish
| LILACS
| ID: lil-106543