by Petrus Suparyanto, FIC
$7.00

by Ir. Kaslan A. Tohir
$9.00

by Richard Denny
$11.00

by JH. Rapar
$11.00

by Drs. Thohir Luth, M.A., dkk
$6.00

by dr. Iwan Ikayuda, dr. Sukonto K., Prof. dr. Sjahriar R
$20.00