by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $5.00
by Ir. Bambang Cahyono $7.00
by Prof. Dr. Machasin MA (ed.) $7.00
by K.H. Zainal Arifin Djamaris $6.00
by A.M. Mangunhardjana, SJ $6.00
by $5.00
by Joko Suyatno, Ig. $4.00