by Sayyid Sabiq $9.00
by Ir. Abbas Siregar Djarijah $6.00
by Prof. Dr. Soekanto $5.00
by Prof. Dr. Moh. Mahfud MD, S.H., S.U. $9.00
by Drs. H. Najamuddin $6.00
by Ir. Loekas Soesanto, M.S., Ph.D $11.00