by Ir. Bambang Cahyono $7.00
by Ir. Sutaman $6.00
by Ir. H. Rahmat Rukmana $6.00
by Herbert G. Hick dan G. Ray Gullet $20.00
by Hutabarat, Sahala & Evans, Stewart M $5.00
by Prof. Dr. Oemar Hamalik $9.00