by Ir. Abbas Siregar Djarijah $6.00
by Ir. Daisy P. Sriyadi Hendaryono $6.00
by Briege McKenna, O.S.C. & Henry Libersat $6.00
by Ernest Mariyanto $6.00
by N. Edy Soetanto, BE. $5.00
by Noer Iskandar Al Barsany $5.00