by Dr. H. Pidyarto Gunawan, O.Carm $4.00
by Ir. Rabiatual Adawyah, M.P $7.00
by J. I. G. M. Drost, SJ $7.00
by $7.00
by Ir. St. Eka Adiwibawa $9.00
by Drs. Agus M. Hardjana, M.Sc., Ed $5.00