by Prof. Dr. S. Nasution, M.A.
$7.00

by F.X. Djumialdji, S.H.
$5.00

by Kartohoesodo, Soehardo
$7.00

by Anton Gerbono & Abbas Siregar Djarijah
$6.00

by Dergibson Siagian & Sugiarto
$13.00

by Subiyakto Sudarmo
$6.00