by William A. Meninger, OSCO. $6.00
by Ir. Heinz Frick $6.00
by H. Rahmat Rukmana $6.00
by Widji Anarsis $6.00
by A. Dodong Budianto $9.00
by Dr. Jan Hendriks $8.00
by Ir. Laode M. Aslan $7.00