by H. Rahmat Rukmana $5.00
by Ir. Setijo Pitojo $5.00
by Ir. Sudadi Martodireso & Ir. Widada Agus Suryanto, MM $6.00
by Muhammad Noor $9.00
by Hatta, Mohammad $6.00
by Ir. H. Rahmat Rukmana $6.00