by Agus S. Gunadi $9.00
by Dr. BS. Mardiatmadja, SJ. $4.00
by Hanafi Asmawi $0.00
by Ir. Loekas Soesanto, M.S., Ph.D $11.00
by Al. Wahjasudibja, Pr. $10.00
by Yuniarti $5.00