by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $5.00
by Ir. Hieronymus Budi Santoso $5.00
by T. Krispurwana Cahyadi, SJ $7.00
by Thomas Ballantine Irving $6.00
by Ir. Sutaman $6.00
by Muhammad Ismail $5.00