by H. Rahmat Rukmana $6.00
by Ir. Setijo Pitojo $6.00
by Subiyakto Sudarmo $6.00
by Buckle, K.A., dkk $7.00
by Ir. Kaslan A. Tohir $9.00
by Oemarjati, Boen S. & W. Wardhana $6.00