by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $5.00
by Lie Chung Yen $9.00
by F. A. Suwandi Wihardjo, B. Sc $6.00
by Ir. Abbas Siregar Djarijah & Ir. Harsono Puspowardoyo $6.00
by Hiro Tugiman $7.00
by Agus S. Gunadi $7.00