by Ir. Juhaeni Radi $6.00
by Ir. Abbas Siregar Djarijah $5.00
by Stefanus Osa Triyatna $4.00
by Heinz Frick & Tri Hesti Mulyani $5.00
by Ir. Ari Wijayani Purwanto $11.00
by Ir. Pracaya $6.00