by ISEI $12.00
by Prof. Dr. Hj. Sutyastie Soemitro Remi & Prof. Dr. P. Tjiptoherjanto $7.00
by Ir. Hieronymus Budi Santoso $6.00
by H. Rahmat Rukmana $6.00
by - $9.00
by Frans Harjawiyata, OCSO $4.00