by Hari Poerwanto $11.00
by I. Al-Abyadi, Terj. Halimuddin, S.H $7.00
by Ir. Heri Purnama $11.00
by Prof. M. Nasroen $7.00
by Prof. Moeljatno, S.H $5.00
by Drs. H.M. Daryanto $9.00