by Drs. Abdullah Ali, Drs. Misbandono, dan Ir. Eny Rahma $7.00
by Guenther, Ernest $7.00
by Prof. Dr. S. Nasution, M.A. $9.00
by Prof. Dr. Ir. Rokhimin Dahmi, MS $18.00
by H. Mardaham Al Imam Tk. R.M $7.00
by Ir. Suharto $9.00