by Ir. Indro Purwono $6.00
by Ir. M. Lies Suprapti $5.00
by Dr. Beate Jakob, Dr. Cristoph Benn & Dr. Erlinda Senturias $7.00
by Silih Agung Wasesa $16.00
by Ir. M. Lies Suprapti $6.00
by Drs. Agus Handoko $5.00