by Ir. Daisy P. Sriyadi Hendaryono, M.Si & Ir. Ari Wijayani $6.00
by Ir. F.X. Susanto Tumpal HS. Siregar $5.00
by Graputin, Yefigarata S $5.00
by Swasono, F. Meutia $7.00
by Sanusi, Bachrawi $5.00
by drh. Soeharsono $9.00
by Drs. Agus Handoko $5.00