by Prof. I. R. Poedjawijatna $6.00
by Ir. L. Widarto & FX. Sudarto C. Ph $5.00
by Nabil Hamid Al-Mu\'az $11.00
by Drs. H.A.F. Idris $11.00
by A. Eddy Kristiyanto, OFM $9.00
by Ir. Daisy P. Sriyadi Hendaryono $6.00