by Ir. G. Djatmiko Sudarmo & Ir. S. J. Edy Purnomo $11.00
by Lerbin R. Aritonang R. $9.00
by Indriani $6.00
by Andrei Aksana $11.00
by Gustian Djuanda & Irwansyah Lubis $12.00
by Ir. M. Lies Suprapti $7.00