by Ir. M. Lies Suprapti $6.00
by Ir. Heinz Frick $7.00
by F. A. Suwandi Wihardjo, B. Sc $6.00
by Drs. Aloysius Soenarto & Stanislaus Suliangto $4.00
by Ir. Rudy Gunawan $5.00
by Suhardi, dkk $11.00