by Eddy Kristiyanto, OFM $7.00
by Lisa O. Engelhardt $6.00
by Ir. Hatta Sunanta, B.Sc., MS $5.00
by Adil Fathi Abdullah $6.00
by H. Rahmat Rukmana $5.00
by Dr. H. Abuddin Nata, MA $7.00
by Dr. Al. Purwa Hadiwardoyo, MSF. $4.00