by Dr. Ibrahim Bafadal, M.Pd
$7.00

by Trim Sutidja
$7.00

by Drs. Ahmad Rohani., H.M., M.Pd
$6.00

by Prof. Dr. Sondang P. Siagian, M.P.A
$11.00

by Prof. Dr. H. Muhaimin, M.A
$11.00

by Drs. B. Suryosubroto
$9.00