by Ir. Setijo Pitojo
$7.00

by Aholiab Watloly
$9.00

by Drs. Theo Riyanto, M.A., FIC. & Drs. Heru Susanto
$4.00

by Ir. H. Rahmat Rukmana, MBA., MSc.
$5.00

by Ir. Heinz Frick
$6.00

by Herbert Vorgrimler
$4.00