by Usmi $16.00
by Soekartawi $9.00
by Ir. Abbas Siregar Djarijah & Ir. Harsono Puspowardoyo $6.00
by Drs. H. Kahar Masyhur $11.00
by Sandra Brown $11.00
by Prof. Dr. Maria S.W. Sumardjono, SH. MCL. MPA $7.00