by Julius R. Latumaerissa, S.E., M.M $7.00
by Freemont E. Kast $16.00
by H. Rahmat Rukmana $5.00
by Prof. Dr. S. Nasution, M.A. $7.00
by Drs. Mulyono HAM, M.Pd $13.00
by Drs. H. Inu Kencana Syafiie, M.Si $9.00
by Ir. Rabiatual Adawyah, M.P $7.00