by Drs. Al. Amin Susanto $4.00
by Ir. G. Djatmiko Sudarmo & Ir. S. J. Edy Purnomo $11.00
by Ir. M. Lies Suprapti $6.00
by Ir. R. Bambang Soelarso $6.00
by Eddy Purnomo $6.00
by Pandi Winoto, CP $6.00