by - $11.00
by Prof. Dr. H. Jalaluddin $7.00
by Dr. Dimyati dan Drs, Mudjiono $9.00
by Prof. Drs. Piet A. Sahertian $7.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Graputin, Yefigarata S $5.00