by A. Widyamartaya, B.A $4.00
by Prof. Dr. Mutawalli Sya'rawi $5.00
by - $9.00
by Ir. Jarot Wijanarko $9.00
by E. Martasudjita, Pr. $3.00
by Said Kelana $6.00
by $12.00
by Ir. H. Sudirman, Mpi & Prof. DR. Ir. Achmad Mellawa $9.00
by Suryokusumo, Sumaryo $6.00
by Prof. Dr. Ir. Rokhimin Dahmi, MS $18.00