by Miftah Sanaji $6.00
by A. M. Mangunhardjana, SJ. $3.00
by Anton Gerbono & Abbas Siregar Djarijah $6.00
by Ir. Hatta Sunanta, B.Sc., MS $5.00
by Eng Antonio Augusta Borelli Machado $3.00
by Roswitha Kornprobst $3.00