by Adi Suryadi Culia $7.00
by Robert Gilpin $11.00
by Dede Owens $7.00
by Prof. Dr. S. Nasution, M.A. $6.00
by Zairin Harahap $9.00
by Khalid Muhammad Khalid $9.00
by Drs. Mardalis $6.00
by $9.00
by Ir. Sujamto $6.00
by Dr. Muh. Fahd Ats-Tsuawaini $5.00
by J. Donald Walters $5.00
by - $13.00