by Ir. Setijo Pitojo $7.00
by H. Rahmat Rukmana $5.00
by Ir. Heinz Frick $6.00
by Ir. H. Rahmat Rukmana, MBA $7.00
by Siti Rahayu - Titiek F. Djaafar-Wiryatmi $5.00
by Ir. Hatta Sunanta, B.Sc., MS $6.00