by Ir. Mul Muyani Sutedjo $7.00
by Ir. Kukuh S. Dewobroto, dkk $7.00
by Lars Forssblad $9.00
by Drs. Abdul Chaer $7.00
by Radiks Purba $12.00
by Drs. Djalinus Syah., dkk $9.00
by J. Donald Walters $9.00