by Suhardo & A. Hadiwiyata $3.00
by Dr. Ir. Muhammad Rasyaf, MS $6.00
by A. Lukasik, SCI. $4.00
by Ir. Lisdiana Fachruddin $5.00
by Ir. M. Lies Suprapti $7.00
by Dr. Franz Magnis Suseno, SJ $11.00