by American Asociation of State Highway and Transportation Officials $9.00
by Ir. Hieronymus Budi Santoso $6.00
by Prof. Dr. Moh. Mahfud MD, S.H., S.U. $9.00
by DR. Andi Hamzah, S.H $7.00
by DR. M. Muslehuddin $7.00
by Drs. Abdul Chaer $11.00