by A. Sonny Keraf & Mikhael Dua $7.00
by Ir. Yudo Sudarto SP $5.00
by H. Rahmat Rukmana $6.00
by Ir. Sujamto $12.00
by Dr. H. Pidyarto Gunawan, O.Carm $4.00
by R. Soemantri $6.00
by Ilana Tan. Dkk $3.84