by Ir. Abbas Siregar Djarijah $5.00
by WK $12.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A. $7.00
by Ir. Hieronymus Budi Santoso $5.00
by $16.00
by WK $11.00
by Sisca Soewitomo $6.00