by Ir. H. Rahmat Rukmana $5.00
by AAK $6.00
by Ir. Hieronymus Budi Santoso $5.00
by Ir. Hieronymus Budi Santoso & Tata S. $5.00
by $4.00
by E. Martasudjita, Pr. $3.00
by J. Donald Walters $5.00