by Agus Rochdianto $6.00
by N. Edy Soetanto, BE. $5.00
by Peter Allis $9.00
by Ir. Hieronymus Budi Santoso $5.00
by Drs. Agus M. Hardjana, M.Sc., Ed $6.00
by Hasriadi Mat Akin $11.00