by LIPI $7.00
by Budi Rachmat $11.00
by $9.00
by Ir. Endar Sugiarto $9.00
by Dr. Hubert K. Rampersad $16.00
by Pandji Anoraga, S.E., M.M dan H. Djoko Sudantoko, S.Sos., M.M $13.00