by Ahmad Ibrahim Abu $11.00
by Pandji Anoraga, S.E., M.M dan H. Djoko Sudantoko, S.Sos., M.M $13.00
by Ir. M. Iqbal Hasan $12.00
by Helbert A. Simon $13.00
by M.L. Jhingan $13.00
by Hannesson, Rognvaldur $6.00