by Charles P. Kindleberger $7.00
by Dr. B. Siswanto Sastrohadiwiryo $12.00
by Ibnu Taimiyah $9.00
by Ir. Abbas Siregar Djarijah $6.00
by H. Rahmat Rukmana $5.00
by Ir. Setijo Pitojo $6.00
by Ir. Rabiatual Adawyah, M.P $7.00