by Darmawijaya, St, Pr $6.00
by Ir. Bambang Cahyono $5.00
by Haryoto $5.00
by Ir. Abbas Siregar Djarijah $6.00
by Ir. Dede Juanda J.S. & Ir. Bambang Cahyono $6.00
by A. M. Mangunhardjana, SJ. $4.00