by Arlyn J. Melcher $9.00
by Drs. Heryando Palar, Drs. Asman Riald $12.00
by Ir. Sutaman $6.00
by Drs. G. Kartasapoetra $7.00
by Ir. FX. Susanto $7.00
by Ir. H. Rahmat Rukmana $6.00
by M. Aleq Sander, S.Dr $22.00