by Ir. Bambang Cahyono $6.00
by Alexander Un Usfinit $9.00
by Ir. H. Rahmat Rukmana, MBA., M.Sc. & Uu Sugandi Saputra, B.Sc $6.00
by J. Stallard, Terj. Drs. Hasymi Ali $11.00
by B. U. Hadikusumo $5.00
by Robert $0.00