by Bambang Agus Murtidjo $6.00
by Dellmann, H. Dieter $7.00
by Drs. Daryanto $6.00
by Suhardjo $6.00
by Prof. Drs. Pamudji, M.P.A $11.00
by Ir. Sri Umiyati Sumeru & Dra. Suzy Anna $6.00