by Drs. Laden Marpaung, S.H. $8.00
by $6.00
by Prof. Abdulkadir Muhammad, S.H. $6.00
by Adu Sumardiman $7.00
by Bachsan Mustafa, S.H. $6.00
by M. Idris Ramulyo, S.H., M.H. $7.00