by Aloys Budi Purnomo, Pr. $3.00
by WK $13.00
by Ir. Abbas Siregar Djarijah & Ir. Harsono Puspowardoyo $6.00
by $6.00
by Dr. P. J. Suwarno, S.H $7.00
by Bambang Agus Murtidjo $6.00