by Hasriadi Mat Akin $11.00
by H. R. Kartadisastra $6.00
by Ir. H. Rahmat Rukmana $6.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00
by P. Suhardiman $6.00
by Ir. Mul Muyani Sutedjo $7.00