by John Adair $6.00
by Syaiful F. Prihadi $13.00
by Mohamad Sobary $6.00
by Dolf de Roos, Ph.D $9.00
by Ir. H. Rahmat Rukmana $6.00
by $4.00
by Rumsari Hadi Sumarto & Lukas Dwiantara $7.00