by Prof. Dr. Sri Mulyani E. S $12.00
by Salvatore M. Sabato, P $7.00
by John H. Hampsch, C.M.F. $6.00
by Ir. Lisdiana Fachruddin $6.00
by DR. Ir. Hj. Tati Nurmala, S.W $6.00
by Dr. James J. Spillane, SJ. $11.00