by Dellmann, H. Dieter $9.00
by Drs. Suwarna Pringgawidagda, M.Pd $18.00
by Ir. L. Widarto & FX. Sudarto C. Ph $5.00
by $11.00
by J. Donald Walters $5.00
by Calvin S. Hall & Gradner Lindzey $11.00