by Wahid Abdus Salam Bali $12.00
by Mahmud Muhammad Thaha $6.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Drs. Save M. Dagun $7.00
by Richard G. Lipsey & Peter O. Steiner $16.00
by Paulo Freire $8.00