by Tanenbaum $16.00
by Tarwoto $9.00
by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $6.00
by Ir. Heinz Frick & Ch. Koesmartadi $6.00
by WK $13.00
by Aziz Alimul $9.00