by Ir. Kukuh S. Dewobroto, dkk $7.00
by James Champy $13.00
by Eddy Tano, Dipl. Chem. Eng. $7.00
by Dr. Suhartono $7.00
by S. Toto Pandoyo, S.H $9.00
by Helmi Karim $6.00