by Ir. Budi Samadi $0.00
by Ir. H. Rahmat Rukmana $5.00
by Rachman Sutanto $9.00
by E. Martasudjita, Pr. $9.00
by WK $16.00
by WK $12.00
by Prof. Dr. Hj. Sutyastie Soemitro Remi & Prof. Dr. P. Tjiptoherjanto $7.00
by Koestoer, Raldi Hendro $7.00
by Dr. A. Supratiknya $6.00
by Suhardjo $7.00