San José, Costa Rica THS (Trejos Hermanos Sucesores, S.A.) 1995 .
223 p. , Includes index. 22 cm..
9977540578

By Chacón Trejos, Gonzalo..
San José, Costa Rica Trejos Hermanos 1964 .
176 p. , Includes index. 21 cm..

By Weston Knight, J. Christopher..
[San José, Costa Rica Trejos Hermanos Sucesores, S.A. 1993 .
255 p. , Text in Spanish and English. 25 cm..

Costa Rica Trejos Hermanos Sucesores 1998 .
285 p. , Translation of: Learn computers and the Internet visually,c 1997. 26 cm..
9977540845(pbk.)