by Suharso, A.S.P $6.00
by Ir. Hatta Sunanta, B.Sc., MS $6.00
by Drs. M. Sastrapratedja $11.00
by Rumsari Hadi Sumarto & Lukas Dwiantara $7.00
by Edhi Sutardja $6.00
by Emanuel Wora $7.00