by Fredy Rangkuti
$11.00

by Ahmad Azma Dz
$6.73

by Dr. Said Kelana & Dr. Chandra W
$12.00

by Herbert G. Hick dan G. Ray Gullet
$20.00

by Drs. Firman B. Aji dan Drs. Martin Sirait
$9.00

by Drs. Ibnu Syamsi, S.U
$6.00