by $16.00
by Ir. Setijo Pitojo $7.00
by Gardner Franklin P; R. Brent Pearce dan Roger L. Mitchell $7.00
by Gottschalk, Louis $6.00
by Nunung Marlina Djarijah & Ir. Abbas Siregar Djarijah $6.00
by Dr. Ir. Wisnu Cahyadi, M.Si $6.00
by K.H. Zainal Arifin Djamaris $6.00