by Ir. Rindit Pembayun, M.P. $6.00
by H. Rahmat Rukmana $6.00
by Prof. Dr. Mutawalli Sya'rawi $5.00
by John Lechte $12.00
by Dr. Zakiah Daradjat, dkk $7.00
by Abdul Munir Mulkhan $7.00