by Drs. Surajiyo $7.00
by Drs. Slamet Santoso $6.00
by Ir. Rustam Hakim $9.00
by Stallings $18.00
by Hasanuddin $11.00
by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $5.00