by Ir. Mul Muyani Sutedjo $7.00
by H. Rahmat Rukmana $5.00
by Made Astawan & Andreas Leomitro Kasih $12.00
by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $6.00
by Dr. Niels Mulder $12.00