by Ir. Hatta Sunanta, B.Sc., MS $6.00
by $4.00
by P. Peter Byrne, C. Ss. R. $3.00
by Ir. Nur Tjahjadi $5.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00
by ISEI $18.00
by Slamet Soeseno $5.00