by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $6.00
by Ir. H. Rahmat Rukmana, MBA., MSc. $5.00
by Prof. Dr. Soekartawi $7.00
by $4.00
by ISEI $18.00
by H. Rahmat Rukmana $6.00