by Prof. H. Muzzayin Arifin $7.00
by Prof. Drs. H.A.W. Widjaja $6.00
by Prof. M. Nasroen $7.00
by Drs. Hasbullah $6.00
by Prijono Tjiptoherijanto, S.E, M.A, Ph.D $11.00
by K. Bertens $7.00