by Drs. Sindu Galba $6.00
by Richard G. Lipsey & Peter O. Steiner $18.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Prof. J. Suprapto, M.A. APU $11.00
by Drs. Zainuddin $7.00
by A.H. Polard, dkk $11.00
by Ir. H. Rahmat Rukmana $5.00