by N. Edy Soetanto, BE. $5.00
by Darmawijaya, St, Pr $6.00
by Wolfgang Bock, SJ. $6.00
by Ir. Sutaman $6.00
by Ir. M. Lies Suprapti $6.00
by Dr. Haryatmoko $7.00
by Ir. H. Rahmat Rukmana & Hj. Yuyun Yuniarsih, SP., MBA., MM. $6.00
by Leila Ch. Budiman $9.00