by Ir. Suharto $6.00
by Subba Rao, N.S $7.00
by Prof. Mr. Roeslan Saleh $6.00
by H. Rahmat Rukmana $5.00
by Wahyu Widodo, Sri Sumarah $9.00
by Ir. H. Rahmat Rukmana $5.00
by Ambarini $6.00