by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Prof. J. Suprapto, M.A., APU $12.00
by Richard G. Lipsey., dkk $16.00
by Von Der Mehden $9.00
by Prof. Mr. Roeslan Saleh $5.00
by Drs. H. Malayu S.P. Hasibuan $7.00
by DR. Wila Chandrawila Supriadi, SH. $5.00
by Prof. Mr. Dr. Sudargo Gautama $6.00
by $6.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $11.00
by Dr. H. Budi Untung, S. H., C. N., M. M. $9.00
by Frieda $6.00