by J. Waskito, SJ. $12.00
by Dra. Kumara Poespo $12.00
by Dr. K.H. Didin Hafidhuddin, M.Sc $6.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $7.00
by P. Suhardiman $6.00
by H. Rahmat Rukmana $6.00