1.
Santiago de Cali, Valle; ASOTEC; 1996. 53 p.
Monography
in Spanish
| LILACS
| ID: lil-259575
2.
Santafé de Bogotá, D.C; Colombia. Ministerio de Comunicaciones; 1993. 36 p.
Monography
in Spanish
| LILACS
| ID: lil-279494