by Ir. A. G. Kartasapoetra
$6.00

by Ir. G. Djatmiko Sudarmo & Ir. S. J. Edy Purnomo
$11.00

by I Ngurah Suryawan
$12.00

by Wolfgang Bock, SJ.
$6.00

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

by E. Martasudjita, Pr.
$4.00