by Drs. Amin Widjaja Tunggal, Ak., M.B.A $11.00
by Drs. Robinson Tarigan, M.R.P $11.00
by Ranakusuma, Boedisantoso $6.00
by - $16.00
by $20.00
by Herbert G. Hick dan G. Ray Gullet $20.00