by Ir. Hieronymus Budi Santoso $5.00
by Peter C. Phan $6.00
by JVS. Tondowidjojo, CM $5.00
by Ir. Heinz Frick & Moediartianto $7.00
by Dr. Ir. Kemas Ali Hanafiah, M.S., dkk $11.00
by Ir. Abbas Siregar Djarijah $5.00
by - $13.00