by Ir. Moehar Daniel, M.S & Ir. Darmawati, M.Sc & Ir. Nieldalina, M.Si $7.00
by Leonardo W. Permana $6.00
by Eko Endarnoko $32.00
by Ir. Burhan Bahar $12.00
by DR. AZHARUDDIN SAHIL $40.00
by Prof. Dr. Oemar Hamalik $9.00