by Robert W. Hefner $16.00
by Hagen Berndt $7.00
by Ir. Moehar Daniel, M.S & Ir. Darmawati, M.Sc & Ir. Nieldalina, M.Si $7.00
by Bambang Agus Murtidjo $7.00
by Ir. M. Lies Suprapti $7.00
by Stefan Leks $3.00