by Prof. Ir. Amris Makmur $6.00
by Fuad Anwar $7.00
by Ir. Hatta Sunanta, B.Sc., MS $5.00
by Mustafa W. Hasyim $7.00
by Dr. Ir. Muhammad Rasyaf, MS $11.00
by Ir. Setijo Pitojo $6.00