by Prof. Drs. H. Soegyarto Mangkuatmodjo $9.00
by Husein Umar $11.00
by ISEI $18.00
by - $12.00
by Suherman Rosyidi $18.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Rozali Abdullah $9.00