by Ir. Dedy Heryadi Sutisna, MS & Ratno Sutarmanto $6.00
by N. Wahyu Sulistiyana $4.00
by Koko Hidayat $6.00
by Wahyuni Mulyawati & Ilse Harahap $11.00
by Sindhunata $7.00
by Prof. I. R. Poedjawiyatna $9.00