by Rai Wijaya $9.00
by Edilius, S.E., dkk $7.00
by Arifin Pasaribu $5.57
by Bungaran Antonius Simanjuntak $23.00
by Soenjono Dardjowidjojo $7.00
by Prof. Drs. S. Pamudji, M.P.A $9.00