by Ir. G. Djatmiko Sudarmo & Ir. S. J. Edy Purnomo $11.00
by Ir. Arif Hartoyo, M. S $5.00
by Maria Farida Indrati Soeprapto, SH., M.H. $9.00
by Ir. Suprio Guntoro $6.00
by J. Donald Walters $5.00
by Hiro Tugiman $6.00
by Heru Susanto $5.00