by Ir. M. Lies Suprapti $6.00
by drh. Soeharsono $9.00
by Ir. Hieronymus Budi Santoso $5.00
by Ir. Hatta Sunanta, B.Sc., MS $5.00
by Thomas Sri Widodo $9.00
by Ny. Susmayati, B.A dan Ny. Hj. Asnidar $7.00