by Dr. P. A. van Der Weij $7.00
by Darmawijaya, St., Pr. $3.00
by Drs. Al. Soenarto S.W., dkk $4.00
by Turban, Rainer $26.00
by Ir. M. Lies Suprapti $6.00
by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $5.00