by Dr. Al. Purwa Hadiwardoyo, MSF. $4.00
by Prof. Dr. M. Mutawalli asy-Sya'rawi $12.00
by Angelo Devananda $6.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $7.00
by A. Reza Arasteh $6.00
by Ir. Heinz Frick $6.00