by Stallings $18.00
by Aziz Alimul $9.00
by Nursalam $11.00
by Ir. H. Rahmat Rukmana, MBA., MSc. $5.00
by Aziz Alimul $11.00
by Aziz Alimul $7.00
by Nurudin Ali $9.00
by Drs. Agus M. Hardjana, M.Sc., Ed $6.00