by Dr. K.H. Didin Hafidhuddin, M.Sc $9.00
by Drs. Radno Harsanto, M.Si $9.00
by Ir. Morisco $5.00
by Andi Rosadisastra, M.A. $7.00
by Budi Tri Akoso $0.00
by M. Eksan $7.00