by Ir. Hatta Sunanta, B.Sc., MS $5.00
by Kathy Kacer $6.00
by Ir. Yushinta Fujaya, M.Si $7.00
by Ir. Abbas Siregar Djarijah & Nunung Marlina Djarijah $6.00
by Ir. Dudung Abdul Muslim $6.00
by J. Sudarmita $9.00