by Ir. H. Rahmat Rukmana
$5.00

by Dr. C. Groenen, OFM.
$8.00

by M. Ghufron H. Kordi K
$9.00

by Ir. AG. Kartasapoetra
$7.00

by James Rachets
$11.00

by AAK (Aksi Agraris Kanisius)
$6.00