1.
Quito; s.n; 2000. 35 p. graf, tab.
Non-conventional
in Spanish
| LILACS
| ID: lil-263778
2.
Quito; s.n; 1999. 37 p.
Non-conventional
in Spanish
| LILACS
| ID: lil-262000
3.
Quito; s.n; 1999. 16 p. tab.
Non-conventional
in Spanish
| LILACS
| ID: lil-263782