by Ir. Sumeru Ashari, M.A gr. Sc
$7.00

by Ir. H. Rahmat Rukmana
$5.00

by Ir. Budi Sulistyo
$7.00

by A. W. van den Ban & H. S. Hawkins
$12.00

by M. Ghufron H. Kordi K
$7.00

by Drs. Djoko Widagdho, dkk
$9.00