by A. M. Mangunhardjana, SJ.
$3.00

by Ir. Dedy Heryadi Sutisna, MS & Ratno Sutarmanto
$6.00

by Ir. Hieronymus Budi Santoso & Tata S.
$5.00

by M. Ghufron H. Kordi K
$7.00

by Ir. Setijo Pitojo
$6.00

by Heru Susanto
$5.00