by Ir. Abbas Siregar Djarijah $6.00
by Titik F. Djafar - Siti Rahayu $6.00
by Ir. Hieronymus Budi Santoso $5.00
by Misran Lawani $0.00
by Drs. Al. Amin Susanto $4.00
by Paulus Wahana, M.Hum $6.00