by Drs. T. Gilarso, SJ $12.00
by Dr. Al. Purwa Hadiwardoyo, MSF. $3.00
by B.B. Triatmoko, SJ $6.00
by H. Rahmat Rukmana $5.00
by H. Rahmat Rukmana $6.00
by Ir. L. Widarto & FX. Sudarto C. Ph $5.00