by Ir. Abbas Siregar Djarijah $5.00
by Drs. Hasbullah $7.00
by C.de Rover $12.00
by Muhammad Noor $7.00
by Ir. Ari Wijayani Purwanto $11.00
by Gunawan Widjaja $7.00
by Abdul Mani $12.00
by Ir. Supraptono Djajadirana $9.00
by $26.00
by Drs. P. Sumardji $6.00