by Ashari, Sumeru $9.00
by Ir. H. Rahmat Rukmana $6.00
by Srivastava. UK., GV. Shenoy, SC. Sharma $11.00
by Drs. Agus Handoko $5.00
by Hoogendoom, J. $6.00
by Swasono, Sri-Edi $7.00