by Ir. Hatta Sunanta, B.Sc., MS $7.00
by Dr. David Sagiv $6.00
by Dr. FX. Mudji Sutrisno & Hendra Putranto $9.00
by Dr. Musfir Husain al-Jahrani $6.00
by Haryoto $5.00
by N. Edy Soetanto, BE. $5.00