by Ir. Bambang Cahyono $6.00
by Ir. Sudadi Martodireso & Ir. Widada Agus Suryanto, MM $6.00
by John Kirvan $6.00
by Betty Sri Laksmi & Winiati Pudji Rahayu $7.00
by dr. LA. Hartono $5.00
by Ir. Ari Wijayani Purwanto $9.00