by Stefan Leks $3.00
by JB. Banawiratma, SJ. $4.00
by Ir. Rabiatual Adawyah, M.P $7.00
by Ir. M. Lies Suprapti $6.00
by Edy Soatanto, N, BE $5.00
by A. Gianto, SJ. $6.00