by Ir. H. Rahmat Rukmana
$6.00

by Drs. Jumingan, S.E., M.M., M.Si
$11.00

by Ir. Hieronymus Budi Santoso
$6.00

by H. Rahmat Rukmana
$5.00

by Dr. Ir. Kemas Ali Hanafiah, M.S., dkk
$11.00

by Ir. Hatta Sunanta, B.Sc., MS
$7.00