by Ir. Hieronymus Budi Santoso $6.00
by Al. Budyapranata, Pr. $4.00
by H. Rahmat Rukmana $6.00
by Bruce Herrick dan Charles P. Kindleberger $12.00
by Drs. Muchdarsyah Sinungan $11.00
by Freddy Rangkuti $13.00