by Ivy Naistadt $11.00
by Ir. Moehar Daniel, M.S $7.00
by Dennis L. Poster $16.00
by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $6.00
by - $12.00
by Drs. Agus M. Hardjana, M.Sc., Ed $6.00