by Glenn A. Welsch $13.00
by Ir. Mul Muyani Sutedjo $7.00
by Drs. Djalinus Syah, dkk $6.00
by Supardan $7.00
by Robert N. Anthony $7.00
by Dra. L. Simanjuntak $7.00
by Bachrawi Sanusi $7.00