by Al. Wahjasudibja, Pr. $3.00
by E. Martasudjita, Pr. $3.00
by $11.00
by Ir. Heinz Frick & Pujo L. Setiawan $7.00
by Drs. E. Sumaryono, MA $6.00
by Ir. Heinz Frick $6.00