by J. Heinrich Arnold $8.00
by Ir. H. Rahmat Rukmana, MBA., MSc. $5.00
by Prof. Dr. Soekartawi $7.00
by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $5.00
by Ir. M. Lies Suprapti $6.00
by $4.00