by Petrus Suparyanto, FIC $7.00
by Ir. Nur Tjahjadi $6.00
by E. Martasudjita, Pr. $3.00
by Rochelle Semmel Albin $6.00
by Ir. H. Rahmat Rukmana & Yuyun Y $6.00
by Prof. Dr. Soekartawi $6.00
by Ir. Fauziah Muhlisah $6.00
by Adriyarkara $5.00
by Karen Katafiasz $3.00
by P.K. Ojong $11.00
by Soedharyo Soimin, S. H. $11.00
by Idris Thaha $11.00