by Subiyakto Sudarmo $6.00
by Ernest Mariyanto $3.00
by Djoehana Setyamidjaja, M.Ed $7.00
by Ir. M. Lies Suprapti $6.00
by Ir. H. Rahmat Rukmana, MBA., MSc. $6.00
by Ir. M. Lies Suprapti $5.00