by Terra CH $5.00
by Drs. Zainuddin, dkk $7.00
by Nurul F. Huda $7.00
by Halimuddin, S.H $7.00
by Siti Saidah $6.00
by Dr. Ir. M\'Imadduddin Abdul Rahim, M.Sc $6.00
by Drs. H.A.S. Moenir $9.00
by Dr. Herman Darmawi $7.00