by Eddy Tano, Dipl. Chem. Eng. $7.00
by $16.00
by Datje Rahajoekoesoemah $28.00
by Ir. F.X. Susanto Tumpal HS. Siregar $5.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $11.00
by Drs. Sudarsono, S.H., M.Si $7.00
by $7.00
by Tardjono Abu M. Muaz $7.00
by Cameron West $9.00
by Martin Wijokongko $6.00
by Marguireta Yosinaar $5.00