by Sir Muhammad Iqbal $6.00
by Prof. Dr. S. Nasution, M.A. $6.00
by Prof. Dr. H. Zainuddin Ali, M.A $7.00
by Drs. Jumingan, S.E., M.M., M.Si $0.00
by Drs. H.M. Daryanto $7.00
by Prof. Dr. Makmur, M.Si $7.00