by RW. Allard $11.00
by Drs. E. Sumaryono, MA $6.00
by Haryoto $5.00
by Agus M. Hardjana $6.00
by Ir. Ari Wijayani Purwanto $9.00
by Ir. H. Rahmat Rukmana $6.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00