by Ir. Moehar Daniel, M.S & Ir. Darmawati, M.Sc & Ir. Nieldalina, M.Si $7.00
by $9.00
by Agung Budi Santoso $7.00
by Drs. Muchdarsyah Sinungan $9.00
by Ir. A. G. Kartasapoetra $6.00
by Prof. Dr. Prijono Tjiptoherjanto $6.00