1.
Rev. CIEZT
;
5(7): 43-52, ene.-dic. 2000.
Article
in Spanish
| LILACS
| ID: lil-279106
2.
Rev. CIEZT
;
5(7): 134-41, ene.-dic. 2000.
Article
in Spanish
| LILACS
| ID: lil-279117
3.
Quito; Edimec; 2000. 94 p. graf, tab.
Monography
in Spanish
| LILACS
| ID: lil-297008