by Ir. Hieronymus Budi Santoso $5.00
by Setijo Pitojo & Hesti Nira Puspita $12.00
by Ir. Abbas Siregar Djarijah $5.00
by N. Wahyu Sulistiyana $4.00
by Dr. Niels Mulder $0.00
by Lie Chung Yen $9.00