by A. Gianto, SJ. $7.00
by Ir. M. Lies Suprapti $7.00
by Stefan Leks $4.00
by Ir. H. Rahmat Rukmana, MBA., MSc. $6.00
by Ir. Heinz Frick $5.00
by Ir. Ibnu Dwi Buwono, M.Si $7.00