by Sugiharto $7.00
by A. M. Putut Prabantoro $6.00
by Ir. Hieronymus Budi Santoso $6.00
by $4.00
by WK $13.00
by Ir. Hatta Sunanta, B.Sc., MS $6.00
by Arief, Sritua $6.00
by Drs. G. Kartasapoetra $7.00
by Said Kelana $5.00
by $11.00
by S. Soegijanto $11.00