by W. Arthur Lewis $11.00
by Budi Streptiadi $7.00
by A. Tresna Sastrawijaya, M.Sc $7.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Drs. Abdul Chaer $9.00
by Drs. Rusyadi., dkk $28.00