by Ir. Heinz Frick & Moediartianto $7.00
by Philip Etienne R. $3.00
by Ir. G. Djatmiko Sudarmo & Ir. S. J. Edy Purnomo $11.00
by Muhammad Chirzin $5.00
by dr. Endang Lanywati $5.00
by Dr. Emmanuel Subangun $4.00