1.
Compend. invest. clin. latinoam
;
13(1): 12-3, feb. 1993.
Article
in Spanish
| LILACS
| ID: lil-177350
2.
Quito; IESS; 11 ed; 1992. 62 p.
Monography
in Spanish
| LILACS
| ID: lil-126500