by Dr. BS. Mardiatmadja, SJ. $4.00
by $4.00
by Edgar Morin $6.00
by AAK $5.00
by Muhammad Chirzin $5.00
by Ir. Moehar Daniel, M.S & Ir. Darmawati, M.Sc & Ir. Nieldalina, M.Si $7.00