by Amatullah Shafiyyah & Astriana Baiti Sinaga $5.00
by Ir. M. Lies Suprapti $7.00
by Drs. Amrullah A., S.F., dkk $11.00
by Muhammad Chirzin $5.00
by Abdul Halim Abu Syuqqah $11.00
by Suharso, A.S.P $9.00