by JB. Banawiratma, SJ. $4.00
by Ir. H. Rahmat Rukmana $6.00
by Ir. Yushinta Fujaya, M.Si $7.00
by Desrosier, Norman W. $11.00
by M. Ghufron H. Kordi K $9.00
by A. Lukasik, SCI. $4.00