by Thabrani $11.00
by Ir. L. Widarto $5.00
by Bayu Adjie $9.00
by Ir. Lisdiana Fachruddin $5.00
by WK $12.00
by Ir. Setijo Pitojo $7.00
by A. Muhaimin Iskandar $7.00
by Hilman Hariwijaya & Boim Lebon $6.00
by Indriani $6.00
by Cynthia Geisen $6.00
by Darul Qutni, CH $8.00
by Fachrudin A. $10.00