by Ir. Setijo Pitojo $6.00
by P. Robert De Grandis, SSJ $5.00
by Prof. Dr. Ali Abd. Halim Mahmud $11.00
by Ir. Suprio Guntoro $5.00
by H. Rahmat Rukmana $5.00
by Pijper, G.F $5.00
by Daniel Mohammad $6.00