by A. Setyawan, SJ. $7.00
by Jonni M.S, M.Sitorus, Nelly K $7.00
by Ir. R. Bambang Soelarso $6.00
by Ir. H. Rahmat Rukmana $5.00
by ISEI $25.00
by Al. Purwa Hadiwardoyo, MSF. $4.00