by Syaifuddin $12.00
by Prof. Dr. Askandar Tjokroprawiro $6.00
by John Kirvan $6.00
by Ir. H. Rahmat Rukmana $5.00
by Ir. Juhaeni Radi $5.00
by Th. Aq. M. Rochadi Widagdo, Pr $6.00