by Mastenbroek, W.F.G. $7.00
by Ollen Burger Terj. Budi Sucahyono $12.00
by Drs. H. Fuad Ihsan $9.00
by Dr. Alo Liliweri $11.00
by Husein Umar $9.00
by Prof. Dr. Soegyarto Mangkuatmodjo $13.00
by Dr. Ir. Akhmad Fauzi, M.Sc. & Dr. Dra. Suzy Anna, M.Si $12.00