by H. Rahmat Rukmana $5.00
by PIKA $5.00
by Yustinus Sumantri Hp., SJ. $7.00
by Ir. Hieronymus Budi Santoso $5.00
by Prof. Dr. Kees Bertens, MSC $9.00
by Ir. Hatta Sunanta, B.Sc., MS $5.00