by P. Suhardiman $6.00
by A. W. van den Ban & H. S. Hawkins $12.00
by Ir. Pracaya $6.00
by Engelen O.E. dkk $9.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00
by Ikram, Achadiati $7.00