by ZAPRULKHAN, M.S.I. $6.00
by Ir. St. Eka Adiwibawa $9.00
by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $5.00
by $6.00
by RULLI NASRULLAH $8.00
by V.M. Bambang Soemantri $11.00
by RH. Wiwoho $7.00
by Prof. Dr. Suhartono $9.00