by Agus S. Gunadi $7.00
by Prof. Dr. Loekman Soetrisno $6.00
by Ir. Hatta Sunanta, B.Sc., MS $5.00
by Paul Suparno, SJ. $4.00
by John Kirvan $6.00
by Aloys Budi Purnomo, Pr. $3.00