by Drs. P. Sumardji $6.00
by Yoga Aditama, Tjandra $11.00
by Ir. Endar Sugiarto, B.A $6.00
by Dr. Ir. Muhammad Rasyaf, MS $7.00
by Bambang Soepeno, M.Pd $9.00
by Ir. H. Rahmat Rukmana $6.00