by Ir. H. Rahmat Rukmana $6.00
by Yernelis Sukma, M.S., & Yakup $7.00
by Ir. Setijo Pitojo $6.00
by Baisuni, H.A. Hasyim $11.00
by H. Rusli, Ronnie $5.00
by Soekartawi $7.00