by Ir. Hatta Sunanta, B.Sc., MS $5.00
by Drs. Yustinus Semiun, OFM $20.00
by H. R. Kartadisastra $6.00
by A. M. Putut Prabantoro $6.00
by $0.00
by $20.00
by Sridadi & Rachmanto $6.00