by Marsana Windhu $3.00
by Dr. Ir. H.S. Farid Ruskanda, M.Sc. A.P.U. $5.00
by LIPI $7.00
by Penney Homes $7.00
by A. M. Mangunhardjana, SJ. $3.00
by Roswitha Kornprobst $3.00