by Ivy Naistadt $11.00
by Budi Susanto, S.J. $7.00
by Drs. Ig. Wursanto $7.00
by Drs. Agus M. Hardjana, M.Sc., Ed $6.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Kartohoesodo, Soehardo $7.00